Decided to leave

Me and Fiance have been together for almost 2 years at 6 months together he started treating me bad and then I got pregnant it got worse when I was pregnant, him lying to me, texting girls, drinking and driving and just thinking he was still a teenager. Since I’ve had our son he doesn’t help with baby and I cry every day Bc we fight and I can’t take it anymore I don’t have time to cope with my sons medical condition because I’m always crying over my fiancé. I tell him how I feel and he changes for a day then goes back to how he is . I told him I want a break and that I’m planning to go to North Carolina to live with my sister I want to be with my family. (Did I mention he pushed all my family away from me) he cussed out my mom and both of my sisters and I’ve had enough. I’m proud of myself for working up the courage to leave so I can be happy again. I’m usually really quite and let people treat me however but the momma bear came out of me and I won’t take it anymore I don’t want our son to see his parents fighting every day