Advice ...

So I've been in a relationship with the father with my 3 children for 7+ years... we started dating @16 and I got pregnant and had my baby when I was 17. My whole entire pregnancy he was never around... We lived together but he was always working getting drunk and living his life.. it continued for months after he was even born, I got pregnant again and even then he still wasn't around... our first child barely even knew him , we were on and off and I was jumping from house to house just trying to find somewhere where I didn't feel like I was a burden. We got together after our 2nd kid was about 2 years old .. we got our first apartment ... I ended up pregnant again .. my kids were 3 and 2.. It's always been a cycle of cheating and me catching him talking to other girls and he would get mad when I would speak up or even cried ... it was always something I was doing wrong.. For years I had felt less than and was always letting him manipulate me. Would always come and try to make things right and of course I would fall for it. He's was abusive but it got worst when we got our apartment... he would destroy things and I ended up having to leave the apartment the last time and I had to get another apartment (I've never wanted to leave him cause I was embarrassed of being a single mother and so many other things I had in my mind) anyways fast forward I ended up letting him move to this new apartment.. i am 23 rn and we have 3 kids together , things aren't the same between me and him I finally opened my eyes after years of crying... I no longer cry , and Im no longer bothered . He smokes weed Not that im judging but I've asked him to stop for years and it's always an excuse, he doesn't help out around the house , he is super lazy... No motivation for better ... always says he's going to do something as simple and throwing the garbage out and doesn't, argues and gets in my face even infront of my children... and when I speak about my feelings it turns into an arguement ... lately we can barely talk because everything escalates into an arguement.. I gave my life to Christ and im more matured now. and I think my kids and I deserve happiness and peace. I got a good job and I am attending school , and im getting my life right. I want a better future. I've finally was able to tell him about me not wanting to be with him. He makes me feel like im the problem or something and I just need reassurance that im not .