Break up with him and then go zero contact. Tell him that he's right, that the relationship has become suffocating, that you're both too young to not have experienced things as single people without obligation.
Finish your studies and then when thats taken care of, start seeing other boys. There are better ones out there then this guy and while you're single you can work on your need to control so that you don't feel threatened when the next guy isn't spending 100% of his time with you. You need to learn how to entertain your self and sooth your run-away-thoughts.
Improve your own life as a single so that you keep yourself happy and interesting and you'll have something to do when your partner is out with friends.
You need to work on your insecurity and neediness and inability to self-sooth when you're not with your partner.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion