I really like a girl(friend) who doesn't like me how do I get over this?

So, I really a girl who I am friends with met on campus(college) and I talked with friends about it and I thought very hard about how I felt about her because here is the pathetic part I wanted to make sure on the very off chance she maybe felt the same way that I didn't hurt her by being confused by how I felt but anyways I finally got the courage to tell her that I liked her and obviously she didn't like me back I mean she is this sweet,caring,crazy girl who is also very beautiful I mean she didn't just say " we can't be friends anymore " she was happy we were still going to be friends but honestly right now it is very painful to be friends with her right now but I just care about her a lot and want to be there for her I mean there were girls in the past that I liked out of all of them I only told two girls I actually liked them this girl and one other but anyways I eventually found a reason for each why it wouldn't work out but I can't find any with this girl how do I get over this girl and move on?