Have you dated your best friend, broke up after a couple months, and fell in love with that person?

I'm so confused right now. I dated my best friend for 2 months, we broke up, and then I finally realized how much I needed him after he broke up with me. He said that he now considers me just a friend and I can't get over it! I love him sooo much that I can't stand it anymore! What do I do? Should I tell him or not? Help someone!