I need help with my relationship

So I have been with this guy for about a year and 5 months. He's slowing starting to drop away now that I'm back at school for my last year and he is full time Working. I had work this evening and asked to stay at his house but he said no I don't want to see you tonight I will see you tomorrow. I called him and cried to him begging to stay because I am going insane without him around and it hurts. But he just kept pushing me away saying I was freaking him out
What can I do :(