Family issues, frequent fight at home, lot of harassment

Hi, I live with my 2nd wife after divorcing 1st wife. I have one kid aged 19 studying in boarding school My 2nd wife has 2 kids aged 17 with us. Due to my situation i have habit of taking alcohol during weekends which ends up in fight from my wife un-necessarily. Now the fight gone beyond with lot of abuse from my wife and forcing me to leave house and go away. She is not treating me in any good manner and sleeping away from me, not preparing food at home. Daily she starts fighting with me or kids for unknown reasons. I don't want to leave her or family neither i had plan to do so. Due to her abuse i feel frustrated with an additional disappointment of staying away from my kid makes me even worse situation personally. How can i resolve the issue. I know alcohol could be the main reason but i take it only on weekends just to control and calm my frustration. Can you help