So my best friend's bf texted me saying he wants to win her back. They went out for a year and had a terrible breakup. She's even had about three pregnancy scares. I know they were in love and he even admits he still loves her, which is why he came to me. So as we were making a plan on how to get her back he started dropping hints, saying stuff like "What would happen if me and you did it?" He also said I was cute and he always thought I was cute. Then he honestly wanted to know if I would ever have sex with him. But yet he's in love with my best friend. He still wants to go through with our plan, but what should I do? Do I tell her? I want them to be happy but don't want her to be with someone who would try to sleep with her best friend.