Should I stay in my marriage?

Ok so here is the jist, I have been with my husband for 7 years married for 4 years. We have been through hell and back drugs, booze, kids. even touched a little but on physical abuse. A lot of emotional abuse, the emotional had been coming from both sides lately. I thought that going through some of these things and powering through them would make us stronger as a couple, but some days im just so friggin exhausted. Right now he thinks things are peaches and cream. Not so much. He can be a very intimidating man. And his father as well. I wonder some days if im here because i want to be here or im here because its just a pain in the A%S to leave. The verbal and emotional abuse I would get from him and his father. We actually got in an argument the last big fight my husband i had and he phoned me and totally freaked out on me. Cause my husband had gone crying to him. Im not sure what to do anymore. We have 2 children together, And I know that you should work it out for the kids but some days im not sure that true. The way they see him talk to me or even some days the way I talk to him. Its not setting a good example for there future relationships. He is a fairly controlling person. He doesn't like many of my friends, so if i want to go see them he gets mad cause he can't come cause he doesn't like them. When he drinks he gets extremely obnoxious and invasive and abrasive. Everything turns into something about him. I had my first gig with my band and my friends and family were there to support my band and I. He ended up getting Absolutely hammered and almost fighting people and drunken calling people at 2 am. Totally wrecked my night, once again I couldn't have my moment, where I could just do my thing and not worry about him, Its a regular thing when he drinks. I told him I didn't want to drink around him anymore because he annoyed me and he said it hurt his feelings. I didn't know how else to put it. Im a fairly blunt person. Im 25 years old and I feel like I have one foot in the grave, Depressed etc. I really think the only reason I am here is because I don't want the harassment I will surely receive from him and his father. He has had times when we are good to each other and he is really good to me, but those days are few and far between. The sex is terrible, I just cringe, Were like room ates not married. I just don't know what to do, the paper work the assets and most importantly the children. Should I step out now while im still young and have a life ahead of me, Or should I hang on and hope that one day i'll feel differently?