My ex and I broke up a month ago. We dated for 2 years and we were, or at least I thought we were, very serious about each other. So serious to the point where were going to move in together soon. He's 23 and I'm 21. He broke up with me unexpectedly. He went from telling me how much he loves me to the next day saying that he only loves me as a friend and that the connection isn't there. I recently found out that he started liking another girl and they are already very close to becoming official. I'm suspecting that while he was with me he started liking her and they got close while we were having issues. I don't understand why all this happened. We were having constant arguments over the last 2 months but things were getting better. Now he's making it seem like he was never happy with me and that our relationship was unhealthy when people ask why we broke up. He's even telling people that he has no feelings for me anymore and he's hiding his love interest for this other girl to everyone else. I'm guessing he doesn't want people to judge him. I'm very hurt by his actions. He's a great guy and I was at least expecting more maturity from him since he's 2 years older than I am. What does it mean that he has no feelings for me? Believe it or not, he still cares for me because he asks people how Im doing and is making sure I'm OK. Any advice on this matter or tips to move on would me great. Thanks!

This is all very common. Someone new sweeps you off your feet and suddenly the old love flies right out the window in literally minutes.
You were fighting! Getting along after that doesn't mean it was OK between you, and at your young ages, that's expected. When you got to the moving in together stage, he may have realized that he doesn't want it. Maybe his parents fought a lot, or divorced, or for some reason he was feeling tied down. Not your fault. You just have to accept it all and move on. He DID love you, and he still does care about you, because he's checking up on you. But don't get your hopes up that he will come back. The odds are very, very small.

As you previously have mentioned, you said that you two have been arguing over the last two months and as I'm sure you already know, that can make someone lose interest. Well, depending on what you guys were arguing about could do so as well. I'm not saying you two were arguing about boys/girls (jealousy), I'm saying that if that's the case then perhaps he got to the point to where he didn't want to have to deal with that anymore.
The best advice I could give you, is let him go. Because he obviously didn't love you enough. If a guy really loved you, then he wouldn't have put his attention on any other girl besides you. Just don't jump into conclusions because that usually leads into having negative thoughts and you don't want that. That messes with your head and doesn't help you concentrate. If you don't want to listen to me then you don't have to. You could also just let him know how you feel to get it out of your chest!
And who knows girl, maybe that might make him realize something or get two back together.
If anything remember this, "Expect the unexpected".
I hope I helped!

How odd. As I read through your problem, it seems to me that you already have the answer to your own question.

Why make things complicated? If you read what you posted again you might understand too.

At fist you said he loved you, then you said he asked about you because he cares, so what? I will tell you, love and caring are different, because loving someone allows you to be more involved with someone on a deeper personal level.
Then, you say you two were arguing for two long months, I don't know about you but I feel sick at this thought. I don't knowledge what was this fight about, but it made a huge difference.
And lastly, he is with someone else, if he loved you so much than he would not start a new relationship right after he brakes up with you.

And now let me tell you how weird this "nice guy" is; First, he tells you "I love you." Than breaks up with you the next day, really? And than he is found another girl that fast, what a quick substitution, I don't think he is all that nice. Watch out for him!