<human>: Could you distill the essence of the text into 1-3 sentences?

I promised myself I was not going to do this, but the suspense is killing me. (F/20 here crushing on M/20)

So there's this guy (obviously) that I met because we're together in a couple classes. He transfered from another uni and I decided to approach him and talk to him. Since then we became friends and study buddies, texting each other all the time, talking through facebook, etc. In the beginning there was a lot of flirting between us but nothing ever happened. One day we went to a party together and after a couple drinks we ended up having sex, and it was amazing! We even talked about it a few days after it happened, and he told me that he really enjoyed it and wanted to repeat it. Since then, we still text, talk and see each other just like before, but the flirting is considerably less than before. I thought that maybe I needed to make a move and one Friday night we were drinking at his apt and I climbed up to his bed saying I was "tired" and instead of following me he just stayed on the couch and said I could sleep over if I wanted to that he would sleep on the couch and I could take the bed, and nothing happened. Still whenever he sees me with another guy he gets jealous, and "plays" these little mind games with me (inviting me over to his apt, he's always asking me where I'm at or what I'm doing, he tells me everything, cares about me, gets jealous of other guys, etc). 

So my question is: If he only wants to be friends why can't he just treat me like a friend? Or why is he playing "mind games" if comes down to "it" he doesn't make a move and nothing happens? We're already pretty much together 24/7 plus we already had sex and it was great, so what's going on? What does he want?
<bot>: Had great sex with my study buddy and he told me he wanted to repeat it, but it hasn't happened yet.