Just found this subreddit, so here goes... Her.

I've had these feelings for four years.. she opened up my eyes towards women. She's the most amazing girl ever, great personality, makes me laugh, I can talk to her all day, she's absolutely gorgeous and her smile is simply amazing. She's not like other girls, super down-to-earth. What kills me is she's engaged, and doesn't know how I feel. I hate that she has problems at home and has a super possessive asshole of a boyfriend, and I know I can do better... I see her every now and then, and I've noticed that I've never felt that way when I'm around anyone else, even in my best relationships. What I wouldn't give for her to feel the same, but I know that may never happen. She means so much to me, and because of this, I don't want to put our friendship at risk by telling her how I feel... She'll never know... I love her.