exactly how will you feel if you find out he doesn't have a girlfriend and has just been trying to fend you off? touching your shoulder isn't asking you out. i believe this man is reluctant to go out with you and is coming up with all sorts of excuses to keep from saying it outright. maybe you're aren't his type.

could be wrong, but he doesn't sound like someone that is worth the energy you're spending on him. and as for what you could be doing, you could develop other friends, read, go to a movie, take up a hobby, etc. etc. etc.