Be careful that you don't allow yourself to be 'on the hook', he may be fishing for just that, so remain distant, even if you are screaming your head that you want and need to be with him, just give him the impression of "meh-whatever" if and when he comes to you in the future.
A lot of people get that later, being left on the hook when the one they want is out doing other people...hoping against hope that they'll come back again...and if they do, they'll take off again as soon as its conveniant, how sad, you don't want to be that person...and this guy sounds exactly like the type to do that.