As long as he can fuck both of you he has no reason to make a choice. The most obvious solution is for you to find another man. Here is a little secret about how love works for adult women -I am putting you in that category- is that once you have sex with THE SAME MAN for a few times you will go to love him, and your love for your ex will fade in the process. Put yourself out there in a setting that doesn't include your ex, and simply note the guys who show interest in you. Wait, and LET HIM MAKE THE FIRST MOVE. Make him fight for it so he thinks you are a worthy conquest. Love restored!
Your a fucking slut, you're ruining people's relationships. if i were u id stay away from people your just gonna hurt them
Keep fucking your ex. You will win him around, eventually. Don't let him fool you if he stays with his girlfriend for a while. He is checking to see how much you love him. If you stay and sleep with only him, he will appreciate you more. Don't try to make him jealous, it'll confirm that you never loved him. Offer yourself only to him and don't expect anything back. He will remember your fidelity when he really needs you. He will love you to the end of the earth. Good, faithful, loving, family women are hard to find. Once you've proven yourself, he won't look at another woman.