I can't stop thinking about my boyfriend even though I should be studying?!?

I have two midterms next week and even though I should be studying my brains out, I can't stop thinking about my boyfriend. He's gone camping but before he left we had a little argument and even though I told him it was because I was stressed and he said it was okay, I'm still thinking as to whether he's bothered by it. We've been together for a fairly long time, we never really have serious arguments, and if we do they are about the stupidest things ever (seriously, they are ridiculous lol). How can I take my mind off this?!