I still love him but my best friend just ditches me for him!?

This guy and i were best friends for three years knew everything about each other. I always loved him and he knew but didn't feel the same. I was dying to have him. Finally he breaks up with his girlfriend me 9 months for me. We went out for 4 months and were both so happy. Then he tells me he can't be with me because he's been with someone else. He begs my forgiveness and i really want to. I still love him. I don't for a while and finally i do. We end up talking for a while and when he breaks up with the while he cheated on me with i come to find it was for my best friend who be been keeping it from me. I talk her out me it and she turns around and tarts going out with him. When i confront her she tell me she doesn't care and i trying to forget about me cause it's easier. I still love him and i haven't talked to either me them for a week. What should i do? I look like a fool.