Rebuild friendship with a girl who you used to have a crush on

I've had a crush on this girl for a really long time, and lately, I stopped liking her because I found out that she doesn't like me that much, and that me persuading her to like me made things harder for her, because she doesn't want to be mean to me and say that she doesn't like me. I used to be friends with her, but lately, we haven't talked to each other in months. I recently blocked her on Facebook to drive myself away from her, but after I found out what was going on between her and I, I changed my mind and unblocked her. So I sent her a friend request and also sent her a message that explains that I got over my crush on her, and would like to be friends again. She accepted my friend request, and she replied: "I will accept your friend request but I'm not sure how i feel about us being friends since the friendship is pretty much ruined." How should I rebuild friendship with her?

Give it time and ask her if she wants to hang out sometime. That's all you can do.