What should I do?

12 years ago I met my ex-fiance. We dated for a total of 4 before becoming engaged not once but twice. He left me the 2nd time in 2002 for a woman he said was the love of his life. She dumped him. almost 2 years ago. He was traumatized by the ordeal. Me being the good person I am and hoping for a rekindle wanted to help him. We became best friends since then. We do everything together when he is not dating someone. I am 36 and he is 38. We go on day trips together, walks, go out to eat, etc. NO ! He internet dates quite a bit and it hurts. To the point that I have told him I can not talk about his dates. He has told me he has no romantic feelings for me anymore and does not feel we will ever get that back. But wants to hang with me . He tells me I am his best friend etc. We even do family fuctions together! How do I continue this friendship knowing inside I still love him? I hurt so much. Engaged, apart 3 years and now...best friends. What would you do? what is going on w/him?