You need to try to not see her for a while but dont make it too obvious that your avoiding her. Then try to find another girl. This will be very hard because you have feeling for someone else but its very possable. Try to talk with your rebound girl and see if you can love her.
still has feelings for her
It's because you probly still have feelings for him.
Ask her out again.
If you have feelings for your ex, but are in a relationship, i suggest you break up with your current girlfriend/boyfriend, and see if your ex still has feelings....
because this preson still has feelings for his ex-girlfriend
If the ex-girlfriend still in love with you: Than that means that she is having a hard time getting over the two of you.
She may still harbor feelings for her, and obviously feels guilt for having contact with her while being in a relationship with you.
Either she still has feelings for you or she wants to be friends.
she smiles at her friends behind ur back
Meet up and discuss things.
have sex with your recent girlfriend and keep on until your ex is normal and that means every singl night ok.
You obviously still have feelings for her or you can't get her out of your mind ..