I have been friends with this woman for the last fifteen years. Throughout most of that time I have always had a massive crush on her, which has now grown to me being in love with her. Up until the last couple of years she has always had boyfriends, but is now single. We are both very close, have never argued and always get on together really well. I am concerned that if I tell her how I feel about her and she doesn't feel the same way about me, it may affect our friendship. Any advice on what I should do?