How can I get over this, someone please help!?

so two years ago I married the man I thought I was going to spend the rest of my life with. We get married, I get pregnant and come to find out he wasn't the person I thought I was marrying. He is an alcoholic and over the past two years of our marriage has had alot of issues, jail, lieing, stealing, you name it. but being the supportive wife I was I supported him. Last year in July he left me and our girls and left the state to his moms because being away from his drugs and alcohol was getting to hard so he left, went on one of his binges, became incarcerated and I moved on. Come November we started talking again and he promised he was done and wanted to make it work with me and the girls. So he moves back and of course I carried a grudge on my shoulders for he had done and it was hard, I still didn't trust him when he came back but I tried. I found him a job, supported his recovery, and not to mention he didn't have a license so I made sure he was where he needed to be 24/7 even if it meant dragging our kids out at 12 midnight. I did so much and come to find out since he's been back he has been cheating on me with little teenage girls?? He's 25.....so I kicked him out last weekend and already he is with his little girlfriend. he hasen't called, nor checked up on his daughter. I call my father in law and he totally switched it around saying that if I would of just trusted him and gave him a clean start when he came back and forgot what happened in the past and don't be down his throat so much he wouldn't of left and now this is my bed to lay in. I am just hurt, for almost three years I have taken care of him, supported him and yeah it has been hard because of the emtional rollercoaster he put me through, but I feel so low. How can I get over this, he is s and I know my life was going no where, but the fact he lied and just moved on with his new girlfriend and showed no remorce or emotion what so ever??? What can I do, and I have no way of contacting him, his dad said he dont want me knowing where he is at or to contact him anymore and i have filed for divorce, but how can I get over the emotional state and just move on and stop thinking about what he did and is doin??