Is it normal i always feel my boyfriend control our relationship

My boyfriend and I have been dating for almost three years now. During this time we've been VERY up and down. He's broken up with me 3 times and cheated on me twice and I keep taking him back cause I think he's going to change and for the last four months he really changed. He disconnected him self from his friends and dedicated him self himself to the relationship. He even moved in with me and was willing to do anything I said to make us work. Now, He is back to going out drinking alot and anything I ask to go he says no, because he likes to go out by himself and it's his time to be alone. I disconnected myself from everyone and I have no friends so I'm basically home by myself doing nothing waiting on him to get home. I feel like such a loser and I have no idea what to do. He says it's just a "phase" but like I feel so stuck. I feel like a needy psycho girlfriend cause I just sit hear worrying if he's going to break up with me or cheat on me. I guess I'm just wondering what should I do because when we got back together the last time he promised this would never happen, and it's happening. I