what is wrong with me?

I've been in a long distance relationship for almost a year, and now that my boyfriend is back I'm getting tired of him. 
He wants to go come over every day and stays at my house all day when he does. I have stuff to do and responsibilities... I've talked to him about it and let him know that I'm busy bc I'm studying for upcoming finals but instead he comes over then I have to bust all nighters to complete my work. he says it's bc he misses me too much but I'm honestly tried of how he doesn't give me time to do what I need to do. I've had this talk with before but he doesn't really get it... I kind of want to break up with him to focus on school ( I only have summer school and fall quarter left before I'm done with all my pre req's) I know I should miss him bc we're doing long distance and he's back but I honestly wish he would back off a little... I don't know if I'm over reacting.. is breaking up with someone to focus on school too much? Is this something that can be worked through?