Ok, first of all, S&OBCL isn't a medical term.It is just a term I made up right now that stands for Stupid & Obcessive Behavior Caused by Love. I just felt like creating something on my own, sorry.
Now, let's move on with my history: I've met this girl since September and we developed a deep, deep relationship. She lost her father and I helped her recovering. The more I knew her, the more I actually loved her. And as friendship + love don't mix well together, I'm pretty sure you can guess what happened next.
You've hit the Jackpot. She ended our relationship because I was always looking for "false hope" signals. So, after having my heart broken and hearing her saying something like "I don't care if he's sad" to my friends, we spen 3 months without talking to each other.
In the last Thursday, I sent her a text message asking an opportunity to restart our relationship, so that I could use everything I learned while in NC. She let me, after saying that she treated me badly (always getting away from me, never treating me like the others) because I renembered her of her father who ran with another woman far away from her and her mother. She felt anger, lost,etc. near me.
Today we saw each other and I spent some time of our morning telling her stories and having fun with her. Everything happened in the afternoon:
While we were on a class, I moved to her seat so that I could help some of my mates who were near her (and I was too far to help them from my seat). When I noticed she was pushing me away from the chair, I asked her, in a very low tone, why she was still treating me in a different way. Then she started screaming, arguing with me in front of every one, and asking me to give 2 names as an example of someone else she shared her chair with. After I did, she started calling me a lier, and left me no choice but telling her she actually admitted to be in love with those guys, so that she couldn't say I was lying anymore.
The obvious thing happened next: she became angry because nobody needed to knew that. Anyway she was the one who started everything, since she could tell me to move out without shouting. After we got out of our class, I tried to talk with her but she'd just ignore me. After realising that we could only talk if we were alone, I followed her into the girl's bathroom (sounds amazing and childish doesn't it?). A few girls just stood there, looking at me and I just said in a confident voice "Good afternoon people, how are you doing?". I had a few "Good afternoon"s back and then they all left.
So, we talked for 15 minutes. Most of time she was just ignoring me but then she suddenly understood that I just wanted some answers. She told me I was making her not being herself and asking her too much (do you think that asking to be treated equally is too much?). After telling her everything that happened to me and realising that it'd go nowhere, I felt like I should control myself and get out.
The problem is: I can't get her out of my mind. I've tried to write down everything that goes through my mind when I think of her. Something like this:
1- I miss her and I want her to be mine.
2- She treated me so bad; I think I deserve more than that.
3- What if you're really ugly? She's the 1st one that actually got far with you and accepted you for who you are.
4- I'm sure I can find someone else.
5- What if you don't? What if you just lost the only one that would want you?
And it ends here, where I start feeling bad again. Each one of this feelings I described above control my actions and sometimes it gets awkward.
For example, since I got home, about 2 hours ago, I sent her 3 sms:
1- Are you mad?
2- I mean, just ignore it! I should have left you after knowing how you treat me. Bye.
3- I'm sorry if I hurted you.
(no answer so far, of course). Get what I mean? The bright side of everything is that NC made me win more confidence and self-esteem (otherwise I would never enter a girl's bathroom and actually talk with some girls there). But I felt like: What's the worst thing that can happen? They may call me stupid, idiot, childish, etc. but I've got to finish this once for all.
But I feel like it isn't finished yet. What about it, "doctor"s? After understanding all the symptoms, is there any cure for this?

EDIT: Some spelling mistakes and I skipped a few parts when I first wrote this.

You need to go NC again and move on. I have been where you are, as I am sure many on here have been. The what-if's you are thinking are impossible not to have after a serious relationship with someone.

All I can tell you is that time is your best friend. Until someone else shows interest in you you will always have wonders of what if no one else wants me, but trust me as soon as someone else shows some interest you will be like... wow I can do this.

But first you have to accept the fact that your are better off without this person that continues to throw you to the side before you can get on with yourself.

Thanks dude =) the best part now is that getting into NC again isn't hard at all. 3 months ago I was like "I'm going to delete her number? I can't do that... Then I won't have anyone that likes me" or so ever. Now that I've made it once, and saw amazing results from it, I won't even heisitate about doing it again. Thank you.

In my experience there is no better feeling than getting over an ex and having someone knew come into your life. It just makes everything feel worth it.

You will there at some point... but until then its all about you.
I discussed similar issues on this board as well and I must saying talking about it on here and getting outside opinions helps the process a lot. At least for me.

Good luck :)

Harshness Alert:

So you publicly, verbally attacked her and embarrassed her in front of her peers. You stalk her around school and even followed her into a female's restroom. Then, you cynically excuse your dumb actions with you either gaining something during NC or because you are in a "Geronimo" state because you are childish and have not yet learned to control your emotions. And after all of this, you expect her to want to be with you? Dude, you have many things to learn.

First, you do not stalk a female as that makes them flee from you. Second, if you make a mistake you apologize not try to find some sort of excuse or make up some BULL$h!T acronym to make yourself feel better. Lastly, she owes you nothing because to her, you are nothing more than another student at her school. Be careful because with this type of behavior it is only a matter of time before someone reports you for HARASSMENT.

To answer some of your questions:
1- I miss her and I want her to be mine.
-Too bad, you cannot miss something that was never yours to begin with (because women are not objects).

2- She treated me so bad; I think I deserve more than that.
-You never "deserved" any treatment at all, and after what you did you do deserve more than what you have gotten, but on the negative side.

3- What if you're really ugly? She's the 1st one that actually got far with you and accepted you for who you are.
-If you believe that then that means you have low self esteem, and even lower confidence, which created desperation, enough to walk into a female's restroom, and also hallucination of "power" attained while practicing NC.

4- I'm sure I can find someone else.
-You can, and if you do, please don't make mistakes with that one, because you have completely screwed it up with this one.

5- What if you don't? What if you just lost the only one that would want you?
-That is impossible, someone will fall for you again, you are young, just wait, but you have a few more things to learn before this is possible.

To sum up: Leave this girl alone and live your life apart from hers, stop stalking to her before the authorities get involved, and start healing and learning how to control your emotions. We have all done things, and pretty crazy ones, for love, however what you have is not love is an obsession, if you cannot end it, then seek out professional help.

Good Luck,
Javi

Yea thank you. I mean for real.
You are right. But try to see something from my point of view: I embaressed her in front of her peers? All I was doing was helping my mates and she starts screaming? And I didn't insult her. Couldn't she just say "hey, I'm sorry but I feel uncomfortable". Then I would understand and move away. About everything else, I think I got your point there. I've never seen things like that. Nice point of view, but try to see mine too.

"Yea thank you. I mean for real.
You are right. But try to see something from my point of view: I embaressed her in front of her peers? All I was doing was helping my mates and she starts screaming? And I didn't insult her. Couldn't she just say "hey, I'm sorry but I feel uncomfortable". Then I would understand and move away. About everything else, I think I got your point there. I've never seen things like that. Nice point of view, but try to see mine too."

UnknownLove: I think you would agree with me that her reaction at finding you at her chair was irrational. And it was extremely uncalled for. So... why deal with it? When someone presents some type of conflict you have three options. 1) You can fight back and in turn deliver and exhibit the same sort of reaction as they are practicing on you (aka lowering yourself to their level). 2) Getting intimidated by their attack and not responding anything which will make you feel like a sissy and like you should have done something. Or 3) Because you are better than them, and you are more stable than them you can choose to exhibit being the bigger person, which includes you not only knowing how to win a verbal battle but even more so knowing what fights to fight and which fights to ignore. THAT is what you should have done, so she has disrespected you. So, throw her from your circle and continue living your life, her attack was so insignificant that it does not call for you reacting in such a tremendous way. Learn to let it go, and learn to let her go.

Good Luck,
Javi

Yes, her reaction to you sitting in/at her chair was unreasonable. BUT (yeah the big but), you NEVER should have sat that close to her in the first place.

Time and space dude... don't expect things to be as they were. It'll never happen

Try to get me.
First of all, all we ever had was a deep friendship. I wanted more, but it never came.
And from the very beginning (before what I described), she treated me like a bi***. For instance, if someone took her phone away in order to tease her, she'd laugh and play along. However, when I did, she was angry with me.
When I asked her why she told me that I was "the only one" who knew her, so she treated me in a different way. The whole thing sounded like BS to me, as you may imagine.
So, I don't regret anything I did after everything I've gone through thanks to her.
Do you get what I mean?

You assumed too much. And you broke the first rule of NC! Don't break the NC rule, and restart a darn thing.

That's where the crap collected, and waited to hit the fan. You had enough facts to leave her alone and go about your business, but that wasn't good enough for you. It is what it is, now do NC the right way this time. And stay out of her chair, she is a nut!

"Try to get me.
First of all, all we ever had was a deep friendship. I wanted more, but it never came.
And from the very beggining (before what I described), she treated me like a bi***. For instance, if someone took her phone away in order to tease her, she'd laugh and play along. However, when I did, she was angry with me.
When I asked her why she told me that I was "the only one" who knew her, so she treated me in a different way. The whole thing sounded like BS to me, as you may imagine.
So, I don't regret anything I did after everything I've gone throught thanks to her.
Do you get what I mean?"

UnknownLove: If all you ever had was a deep friendship and you wanted more but it never came, then you should have moved on when you realized that. Why pursue something that simply doesn't want anything to do with you? Even more so if she treated you like a b!tch from the beginning, then you should have let her go and find someone who treated you the way you want to be treated. I personally surround myself of people I feel comfortable with and people who treat me with the respect that I believe they should treat me with, otherwise, I kick them from my circle of friends. If you though it was BS, then that was yet ANOTHER indicator that you should back off, because not only is she now treating you bad but she is also lying to you. And I am not saying that you should stop because you will regret it, I don't know how much you conscience may bother you especially with someone who in your eyes treats you horribly, what I am telling you is that you should back off because she is not someone who you want to be around, let things go with her and don't chase after any more confrontation, if she tries to start something, then just walk away and be the bigger person, THAT will earn you more respect with your peers than anything else you may be able to do in those situations. I am getting what you mean, I am just trying to shed some light on to how you should go about this issue of yours, so that problems with her don't arise again.

Good Luck,
Javi

Thank you =) I'm just going to restart NC then.

You do that-NC all the way.

Good Call ;)