My First Love Girl (coming Out Story)

I have been in an all girls school since I was a nursery and until now college but I never had encounter romance relationship with girls during my past years I even had a boyfriend when I was in highschool but it did not last long. I have been friend with my friend (girl) ex which is a lesbian for so long, she was there for me and so was I when I need a friend and out of the blue she told me that she likes me but then the sad part was she was courting another girl she did not ask me what I felt about her since she knows it was wrong and she is not expecting anything from me, she was scared if i'm bi or not..Thats why she did not ask.. Months after.. The topic just opened and asked me if I ever had feelings for her.. I do not know what to asnwer, at my own little corner I realized that I love her.. But its to late to admit that..Since its hard to get out from the girl she was courting for a year now. I love her, I want her but I want her to be happy even though its not with me. She is the first girl that I fell in love with. I told her that she does not have to make a choice, I dont want her to be confuse because of me. But I really do love her... Should I fight? Or wait? Or just let her go.... May be this is just a phase... Im not really bi.. I dont know how to tell my friends..