IT IS SO DAMN HARD - How DID YOU ALL DO IT? PLEASE HELP!!??

I am trying to get over an ex that I fell in love with but can't commit to me right now. Obviously he wasn't putting me 1st priority, as he wouldn't risk loosing me. But he say's that it wouldn't be fair on me to be with him in a relationship when he can be 100% attentive to me the way he should be.. I have spoken to other people and say the can't be that much of a bad person as he was honest and could have led me on. He feels that I am definately a woman that he would be with no doubt about it if he was looking for something serious. He still wants for us to be friends and see what happens but I CAN'T! It hurts so much. People say stay away from things that remind me of him to get over it but I can't. I keep seeing his/or a simular make car that reminds me of him, I p his work on my way to work on the train. He lives in the same area as my mum, I think of him at work when we use to email each other!! IT IS KILLING ME! I CAN'T GET HIM OUT OF MY HEAD, I JUST WANT TO SCREAM.