What could he be thinking?

I went out on a date with this one guy who I knew from common classes (in college). I found him interesting but I felt he wasn't interested in asking me out again. I texted him a couple of times and he always responded and kept the conversation going, signalling that he liked me. Then I invited him to join some of my friends to a club and he came, flirted with me a lot, but ended up getting drunk and threw up outside the club. He apologized for that a lot next day and even afterwards. Then I told him about my plans for the next week (which was full of events) and asked if he wanted to join. He replied after 2 days and was interested to join the party. And even though I was kind of angry, I said he could come. This time he was being very nice & caring and trying to get romantic, but I decided to let him know that he can't take me for granted and can come and go anytime he liked. He was nice to me all the time but I felt he is probably considering me as just an option. He said he was going to another party the next day where he would have to meet someone with who he had a history and things could get awkward, etc.

It seems weird that he acts that he likes me whenever we meet but doesn't make any move. I am 25, he is 32. Could he just be a player?