Love triangle-ish situation?

There is a girl that i have been in love with since college and she has been dating (and engaged to) a friend of mine. The girl is one of my best friends, the guy is also a good friend. She recently broke up with him and professed her love to me. I feel at a crossroads of what to do. Her friendship and her Ex's friendship is extremely important to me. I don't want to lose it. Then again this is someone who I have been crushing on since my junior year of college. I also dont want her to rush into something she will regret after being in a relationship for 2 years. It's a terrible situation and i dont know what to do.