In love with a friend?

Okay so this girl and I are really close (best friends). Out of all my lady friends, she is the closest. In other words, we have a strong genuine connection. If something were to happen to our friendship, we both would be devastated. People have mistake us as bf and gf haha.... Sadly, she lead me only only to get friend zoned. She was like the first person I cuddled with and kissed (this happened last year and I can't still move one). To make it worse, she is really really attractive. She is like ideal match for me... Anyways, it is tearing me up inside. I think about her constantly and can't seem to let go. I have liked her for three years and I want it to stop. We have talked about it and THERE is seriously no chance of us dating... EVER. She said our friendship is too important for anything bad to happen.

So how do I move on? And don't say I can't.... Im tired of this. She obviously doesn't like me that way. It flat out sucks ****. I should be happy that she is seeing someone else, but it makes me anything else but sad.