In my opinion if you really care about her let her go because once you love someone.... they will never stop. It might be hard. Or you can prove to her that your better for her than he is but if you really care about her then you should let her go. There are always going to be other people.
You can't trust her anymore. Give up.
Thats impossible
Try and win your boyfriend back over or let him go since he doesn't care about you any more
yes definatley! it unless she still loves you?
You can not do much, except wait and see. If he will leave his current girlfriend, then you can try win him back. But till then, you can do nothing. Sorry.
Unfortunately he has moved on and so should you.
Have you tried flirting?
If she doesn't have a new boy friend, ask her out. Buy her some flowers and tell her you're sorry. If your ex girlfriend still loves you, it would not be difficult having her back. But, if she doesn't have any feelings for you then you should win her heart back the way you used to do back then.
Stay out of it! You had your chance with her and it didn't work, so as long as her boyfriend is still around it's best to move on. If you find you still love her in a few months then the only time you should feel free to try and win her back is when and if she break-ups with her boyfriend. Yes if you have feelings for her you need to at least try to get her back.
Just be her friend. Don't push it. If she wants you back, then she'll eventually come around. Don't stalk her or nag her on the phone. Don't be needy.
"He loves her, and she loves him, and he loves somebody else, you just can't win" from the song "Love Stinks"
no