Can't sleep at his place

Does anyone know how to solve this problem? I have been dating my boyfriend for about 6 months. He is my first actual boyfriend and I really do like him a lot. I would even say that I love him. We are both in college, and when ever I want to spend the night at his place, I can't seem to sleep properly throughout the night. I wake up in intervals continuously. He snores, but it isn't a problem unless his snoring pattern changes(I get scared that he'll stop breathing). If he moves, or tries to cuddle/touch me in his sleep, I will wake up. He gets sad when he sees that I have puffy dark circles and that I am tired in the morning. We've tried sleeping on separate mattresses. Although it was less frequent, I still woke up, glancing over to check on him. I've never had this problem with anyone else. I've slept in unfamiliar places with unfamiliar people, and slept the whole night through (college dorm and family/friend sleepovers 💀). Is there something wrong? How can I sleep better when I am at his place?