I can't sleep when my boyfriend is in bed with me

I've officially been with my boyfriend for a little over a year now (but we might as well have been dating for 3, it's a long story lol) and recently since we started college we've had the freedom to have more sleepovers. We've had 4, and not once have I been able to get even a little bit of sleep with him in the bed. 3/4 times were almost complete all nighters, not intentional at all. Sometimes he snores but even when he's quiet I still can't fall asleep and I have no idea why. We had a sleepover last night in a really nice spacious king bed and I didn't even get an hour of sleep, I was tossing and turning the entire night. I love him and I love being around him and close to him, he really calms me so I have no idea why I have issues falling asleep. Has anyone else gone through this? How do you fix it? :( I wanna be able to enjoy and actually sleep with him.