You should be SO grateful that he's being honest with you. So often men don't really want relationships but go along with things because they want sex - which ends in heartbreak for us! Accept the fact he doesn't want a relationship and move on! Put your energy into finding someone fabulous who wants to be with you - why would you want to be with a person who doesn't want to be with you?
I know it sounds harsh but move on, theres someone out there for us all and you will eventually find him!! Go out with your mates, have a drink and face mask in the house with a chinese and a sloppy film, go out and get drunk on the pull, whatever floats your boat as long as you're having fun!!