What do I do

I've been with my partner for 4 years and I love him a lot. I've recently been prescribed anti depressants and I just always want to be alone and I feel like he is draining my energy. We have 4 months on our lease and I dont know what to do. I just feel all the time that i would be able to cope with things a lot easier if i wasnt in a relationship. He is extremely needy and always wants to be with me and I cant focus on uni. I just dont know what to do about the whole situation I cant just move out and leave him to pay all the bills we are supposed to be splitting.