Not interested? Ahhh men!?

I've been on 3 dates with a guy and I really liked him. We kissed everytime and last time we even made out for ages. But I just asked if he wanted to do something this week and he told me he thinks this is just friendship to him and he doesn't want to mess me about. Which, yeh was really good of him to tell me. Not all men are that honest. I do really like him now however which is abit of a bummer. Any ways to change his mind?