I have no one else to talk to.

So me and my husband have been together for 5.5 years and we have been married for 2 years and we have a 4 year old son. We were very young (17&18) when we had our son and our relationship has been so rough the whole time. He is a aspiring musician, and he's very talented don't get me wrong but he's lazy. He could make it somewhere in the industry but he doesn't care enough to do something. He always says that it's his dream to become famous and blah blah blah but he doesn't put in the hard work and time to do it, he just thinks that one day he will meet the right person and it'll take off from there. Well here recently he's in a new band with new people and they sound really good, my husband wrong and recorded all the music, but he's always blaming me for him not being as big as he wants to be. He says I don't support him enough and idk how else to support him, I buy him what he needs when he needs it I bring people to his shows I talk to people for him and all that other shit. Idk but he keeps getting in bad moods because when he thinks too much about not making it big he gets passed and he takes it out on me and tells me I'm a shit wife and I don't do anything for our son and I'm lazy. Ok now I'm a hair dresser who owns my own salon (yeah I'm 22) I work 50+ hours a week come home take my son to dr appointments because he's dealing with some minor health issues right now. I'm the one who feeds him, buys him clothes, pays our bills everything. While he jumps from shitty job to shitty job, where he gets paid cash under the table. We can't buy a house I had to buy both of our cars because he spends most his money on cigs and booze. Well the past few days I've been telling him that he needs to get a real job or he needs to leave and he's taking that as "quit your band or leave" and I don't even say that to him!!! I would never tell someone to quit their dream, but he needs a job!!! A good job or he needs to go to school but he's so damn lazy he won't do either!! I have literally filled out 4!!! Applications for him and he won't follow up with them. I need to leave him I know but I'm scared. Idk why I'm scared, maybe it's because I haven't been alone in almost 6 years. Does anyone have any advice for me? I need to do something fast I need to kick this loser to the curb but for some reason I always go back to him!!!! Uggghhhh sorry this is long I just needed to let it out, I have no friends because of him...