Long Distance and Drinking Relationship

I'm a Junior at a university and have a hard time dealing with the fact that my boyfriend likes to party. Although he has promised to tone down his drinking problem for his and our sake, I still worry. He is an hour and a half away and when we are not together, I worry about him constantly. I can only hope he will make good decisions when we are apart. Just the other week after a party (he was buzzed, apparently) he fell asleep at the wheel and wrecked his car.

How can I cope with not thinking about him so often and worrying? He loves me, has left most of his old life behind and wants to be with me forever. I see him two times a month and when we are not together, he parties and drinks alot. I don't want to be his mother and tell him to stop drinking so excessively and to stop partying. I fear that absolute change can not happen when he surrounds himself with friends who literally party everyday- who have no job like he does. He is worth so much more as I always assure him.

When he moves into his apartment in August with his partying friend, they are going to have get-togethers/parties every weekend. How do I deal with this? I slave away every day and every weekend with two jobs and being a full-time student. It bothers me that I work so hard and yet his friends do nothing.

I forgot to mention that it's very hard on me because when he is out at parties, I have no choice but to stay home and do homework or study. My friends are away at other colleges, so I am ALWAYS alone. So I'm usually very lonely and always sick. I was placed on Anxiety medication. It's difficult to occupy my mind with other things but him. He is a wonderful companion, lover and boyfriend. I just need help in dealing with seeing how different we live our lives and how I can make things easier for myself.