Need advice...please

Hi. Back in October the guy I was/am very much in love with broke up with me. We decided to stay friends and all. Then he told my best friend he had a crush on her all the while knowing my feelings for him and how much I love and cherish my best friend. My best friend didn't tell me but I found out and then she told me and we got into a fight. We decided to stay best friends and work through it. Anyway, he and her talk but I'm uncomfortable with it, but I also can't stop it. But I know I wouldn't be able to handle them seeing each other and hanging out. My best friend knows that and has declinded hanging out with him before, but I think now she's thinking about it and I can't tell her how I figured that out and I dunno what to do. I dunno how to handle this and I'm freaking out. I need help. What should I do? Should I tell her that i have a feeling and tell her how i feel about them seeing each other and ask her once again to not hang out wit him or what? Please. help me please?!??!

Hi. Thank you for the advice. I've tried that...but it's so hard. I love my best friend so much. I dunno. She keeps saying she won't hang out with him cuz she knows it'll hurt me, but I dunno if I believe it yet. She keeps saying they hardly ever talk and I dunno if I believe that too. Perhaps I'm just paranoid....what do you guys think??? I need advice and help. Please?