My bf and me have serious issues

We are in college. I moved off campus because it would allow us more time to be alone. But I feel like I don't see him as often now that i'm off campus.

I'm only a block away from campus, but it's technically off campus.

Anyway, I did this so we could have more time to be alone. He comes over sometimes, but then he doesn't even spend the night.

He claims he has to go to study group and needs time to study. But since I am off campus, and we could be alone here, he could quietly study here.

One time he came over and I was looking forward to an evening with him. Instead, he left after just about an hour and claimed he had other plans with his friends.

And then sometimes I don't see him for a few days. And he claims he has labs, and class to go to. Then he said he had to eat at the dorm, after I had bought groceries for us.

We have other issues too. Since I'm a year ahead of him, we are supposed to go see his advisor, so he could take increased course load, so we could graduate together. But he has put this off, so we lost a whole semester of planning on that.

And then he had to go rock climbing one weekend. He was gone all weekend and then I didn't see him until the next Thursday. The rock climbing group has both guys and girls in it. He makes me feel left out. We could have had a nice weekend together. Instead he was with other people.

I'm so confused about our relationship. He's acting like a kid, when he should act like a man, when he's in a relationship like we are.

I'm going to draw a line in the sand. I'm going to tell him he needs to spend the night if he's coming over here. Otherwise don't come at all. He needs to understand our relationship comes first. He needs to grow up. We are both adults, but only one of us is acting like an adult in this relationship.