What are we? What should I do?

First off, I'm almost 19 and in my first year of college. So I've been talking to a guy since October but it was only casual chatting. But one night in December we hooked up and we ended up having sex. Neither one of us were completely sober at the time. But the next day after i left his dorm he was still really nice but he didn't send a follow up text. (My friends said that was a big no-no) I wasn't too upset because I had a lot of work and he said he did too, but a almost a week went by and i didnt hear anything from him until I text him first. He said he didnt want to bother me and continued a conversation with me about anything else.

Skipping to winter break he texts me and asks me on a date because we found out (in earlier convos) that we lived near each other. We made plans but the snow stopped them from happening.

Coming back from break (a week ago) he text me on thursday and asked if i wanted to come over. So since i had thought about him a lot over break i said yes. When I was there, we talked for a while, tried going out, but we didnt find anything fun so we went back to his room. We had sex and I spent the night...again.

Then Saturday night we both went out with our friends and we were both drunk texting and around 4am he asked me to come over. I said no this time, because I wouldn't have been able to get in his dorm anyways. But then yesterday afternoon he asked "can i hit," he had already said he was still kind of drunk so I just passed it off but I did agree to go over.

This time was completely different, we talked about music, games, random stuff. We even messed around a little, but we didnt have sex and he didnt seem to mind. He invited me to hang out with him and his friends this weekend and I said yes.

My question is do you think he's just using me as a booty call, or is he starting to like me? Wondering because I dont want to develop feelings for him, just because I lost my virginity to him.