Ok, I dated this girl for 11 months. Everything was going well. I was a perfect boyfriend according to every girl that knew my ex. I bought her gifts, roses, pay for her food, take her to school and bring her back. I even was stupid enogh to buy her a $500 phone!! But anyway a week ago she started hanging out with this guy and apparently cheated on me. Of course I had to say something and well we ended up braking up. Now She tells me that her mom told her that we should date other people and see what we really want. So she is now dating this guy, but what hurts the most is that we all 3 work in the same place and it hurts to see them together. I just feel like braking his and her face because I was so good to her and she just turns around and does this? But listen... this guy is the biggest player there is. He dates girl for a week or two and then just dumps them. And see my girl knows that because he did that to two of her best friends. And even before all this happen she even told me that she woulnt even think about dating this guy. But lok at her now she is probably sleeping with him as I type this. Idk everyone says she is going to come back, but Idk if I can take her back because I'm so mad. But now I want to get pay back but I don't know if it's a good idea. Will someoone tell me what to do? Thanks!!

First of all, a girl is not some sort of a machine that is good to you if you buy her nice things and whatnot. She usually has her own thoughts and feelings, regardless of what people say about girls. You buying her gifts and whatnot were just that, gifts. It's stupid to think she owes you something for that.

You seem a bit young, to think that being a "perfect boyfriend (by the way, you're not one. Trust me on this one. No one is.)" will guarantee that person will stay with you. She may just not like you anymore... simple as that.

Also, "her mom telling her she should date other people" may be true, but I think it's pure crap. Chances are, she lost feelings for you and now likes the other guy.

The things you did for her... are now sunk costs. Move on.

Ok, first off, that was very sweet of you to do those things for her :)
If she knows it, she obviously isn't in the relationship for love. It may be lust or just for sex. If she wanted a sexual relationship and you weren't giving it to her (which I think is a good idea because sex should only be done between 2 people who love each other and or are married) then she may have went to flirting with him to get what she thinks she needs. If that is the case I would say to forgive her, BUT if she left you to date him because he's hotter or whatever then don't be mad, but I wouldn't advise taking her back. If she dumps you that easily just to get something out of a lesser guy then she wasn't aware of what she was losing and isn't worth giving a second chance.

I don't know the circumstances, so anything I said that may have offended you, I'm sorry.

One reason you will hear most of us always say, never date someone you work with, the pain will take almost forever to stop since you can't do the no contact it takes to get over faster.

But women leave men, men leave women it happens, what you buy them mean nothing, it is the emotion part ( unless of course they are merely looking for a sugar daddy)

First of all sorry to say girls like bad guys you were 2 GOOD TO HER and yes that can happen and YES some girls appreciate it and you guys will live happily ever after. But for the girls who don't and you break up... like so... yes it hurts but you need to face it she wasn't good enough for you.. and that's true obviously you offer her the finer things in life. Some girls don't realize it until they have and get nothing . She wants a bad boy let her have it.. yes it will hurt but it will hurt her more because there is no way they will be happy together if he is as bad as you say. You will get your revenge and the "player" will give it to her.. of course it will come back on him to... but regarding the if she comes back the " take her back issue" if I was you hell no because she wants her cake (you) and eat it to ( the player) if she comes back she is saying she likes you but she wants to see if he was better if he is not then I will go back to u.. and we all know you sound better then that ! Also if I might add she is disgusting for dating a guy who dated her best friends but that's just me if you want her back then that's on you GOOD LUCK :)