What do I do about this situation?

I have this friend that I developed strong romantic feelings for. I do and would everything in the world for her. We always go out to dinner, and I always pay haha. Bottom line, I'm positive that she is the one for me. I told her, I couldn't keep it a secret anymore. She told me "I love you as a friend, sorry"
Here's my problem...it's been a long time, and I still have strong feelings for her. She keeps telling me "You'll get over me I promise; there are a million better girls than me" That's ridiculous, because in my eyes there is no one better! Why does she think my being in love with her is just a phase?
She still wants to be friends, but how can I when she's going to pick other guys over me, especially when they don't treat her as well as I do. She said "I just don't like you" but, for some reason I feel like she will eventually like me. Do I just have to wait? I'm confused, because I really do love her more than anything, literally more than anything. She motivates me, inspires me, she makes me want to be the best I can be. My whole life I just cruised along, until she came along. I just love her way too damn much for her not to like me. I can't stress it enough, and this is why I have a problem. My love for her is true. What do I do?