This happened to me before - I asked a guy out and he told me it was the wrong time and he was scared that he would hurt me (which at the time I thought was just a cop-out excuse). But I still remained really good friends with him and talked just like we used to, on msn, at college and stuff. About two weeks after I asked him out (once it had stopped being awkward between us) he started being really friendly again and acting as thought he liked me again (cos he used to act like the before I asked him out). And eventually, about 3 months later, he asked me out, and we are still together 6 months later.
So it may be that this guy has realised he made a mistake. Or it could be that he just doesn't want you two to lose the friendship that you had before. I would say ask him, but that could just make things even more awkward, so maybe just leave it and see what happens, like I did.