First, I commend you for working so hard in college! That's the way it should be at this time of life. Have fun when you can but sometimes friends and boyfriends have to wait. That's called priorities and am glad you are a girl that has them straight! I'm sorry you are a nervous person and have generalized anxiety. You are NOT alone though. Very common. It would be helpful to work with a therapist at some point just to get some good coping strategies so you can be more peaceful and turn that brain noise off (the anxious voice) inside of you. Do you take medication? That sometimes helps too. But when stressed about things like school and even about being nervous with a boyfriend who is also acting nervous . . . the anxiousness is going to get even worse. deep breathing really helps, meditation, things like yoga and regular exercise. Now, sleeping with someone? That's always been hard for me at first. It's hard to just fully relax like that in a relationship where it's not every night you sleep with. OMG, I used to worry if I snorted in my sleep, drooled, or woke up with a huge zit on my cheek facing the boyfriend! I'm an old married lady now so that is WAY over. Now I just want my ZZZZ's. And if you are a light sleeper, it's also hard. I am this too. Every strange sound or movement or place sets me up for not sleeping well. Hotels, camping, etc. I like my own 'stuff', my own level of dark in the room, my own white noise, my own comfy covers. And the breathing of someone else you aren't used to can keep you up. When dating, I had a friend tell me this . . . it did help (a little). The guy falls asleep. You hear them breath. You then try to match your breathing to theirs. Same count. You get into the same breathing rhythm and you hear them less. Or tell them you need a fan to sleep and get a fan in there. That always helps with blocking noise that keeps you up. When I first got married, I realized my husband had a leg thing. In the middle of the night, he would try to plunk that leg on top of me. This is not romantic but that leg was hot, sweaty and felt like a tree trunk. At first I'd try to deal with the leg. then I finally learned to put my hand up so the leg didn't go over me. No more dead, hot, sweaty tree trunk leg keeping me up (marital bliss).
Anyway, that's my way of saying that it is not unusual to have to adjust to sleeping with someone and during a stressful time like college when you need sleep, maybe make it just a weekend thing when you have no classes the next day and practice the breathing and try the white noise. Hope it works out. good luck