Starting to like a close friend. Help?

ve been good friends with her for a little over a year, i thought she liked me for awhile but one of my friends told her i liked her and she didnt like me back. But, I was already really attatched and thought that we would be together someday so I kept chasing after her, months passed and i was completely obsessed with her. I finally gave up when she got a bf got a gf and dated her 4 a few months. She helped me through me and my gf's breakup and a lot of other hard times. We didnt talk very much for a while but we recently started talking a bit more and my feelings for her are coming back. She is really nice and funny, we always have really fun conversations and shes the only person that i fully trust, and on top of that she is the sexiest girl i have ever met: beautiful face, curvy, perfect shaped and sized breasts... just amazing looking, a 10 out of 10. She still has a bf and i didnt think my feelings were noticeable, but, one of my friends who was sitting us while talking said "u want that p***y", i just made a joke to cover itup. What do i do? I dont like anyone else and my feelings for her are growing more and more.