Break up with your girlfriend, if you really like your girlfriend you wouldn't like any other girls
You should not try to get her back. You should try to get over her. If she is happy then you should also try to move on.As heartbreaking as it is for you she has another boyfriend and you cannot make someone do something you want such as your girlfriend coming back to you. Be wise; get out with friends and start dating other girls and if your girlfriend sees you dating another girl it may just make her want you back (that's a maybe) or, you will find the girl that you really should be with.
If you are dating a girl who tells you she is in love with another man then I really think you should take a step back and decide if you want to be with her. That seems like it might cause a trust issue somewhere down the line. Also maybe you should ask her if she knows what she wants....=1. To be with you.==or==2.To be with him=
make sure it really is who they are saying!!
yes.
same thing that you do with the girl you are dating
If a girl loves you and loves another girl then your basically dating a bisexual
if your dating and her stuff is in someone elses house yeah you should be mad.
Question yourself whether you should still want to go to the prom with this girl.
If you really loved your ex girlfriend then you would not be dating another girl and by doing so if you have a small percentage of getting your ex back all she sees is you dating another girl and she will move on. You have to be honest with yourself as to whether you really love your ex or not and if you do then learn communication skills and telephone her (not text her) and ask if you could meet somewhere and talk. If your ex and you agree to get back together again then respect the girl you are with and tell her the truth.
If the girl is dating another guy yet showing interest in you, this implies that the girl is not trust worthy. there is no need to probe any further, don't go for a girl who changes dating partners.
Be honest and stop seeing her.
You should reconsider if you really "love" this guy.