I don't think he would have "drifted" away if he had any negative plans for you and he wouldn't have just "hung out" for 3 days like that either. He doesn't sound like he's into "living" much less killing, by that I mean he doesn't seem motivated enough to do much of anything? I think he liked you and you liked him and you had a "fun" three days and that's about it. I wouldn't pursue him and I doubt he'll pursue you. Just do a lot of drifting yourself in an opposite direction from his (not be available if he calls, emails, etc.).