I think I'm in LOVE......................?

That is a very, very, VERY BAD THING!! If you guys date, she might regret it and still might have feelings for him. That's great that you're in love, but with your BFF's ex? That's a HUGE no-no. I wouldn't do it if I were you. Go find some other guy to hook up with. Remember, there's other fish in the sea. =)