Single mom

It's my first baby, my baby is due in June and I'm a single mommy, I just turned 19, going to share some of my personal life throughout half my pregnancy, my ex boyfriend made me cry a lot and would blame me for things that wouldn't relate to me, for example: he would blame me for him having a hard time looking for a job or having to look for a job or being mad for no apparent reason, he'd always blame me for him needing to smoke a cigarette or that he needs weed or a drink, because he can't handle the pressure of looking for a job for the baby and would make me feel bad, saying I'm not supportive when I've always encouraged him and helped him look for decent jobs, I would feel like I'd do most of the work, he'd always just be on his phone, he'd constantly would make me cry my eyes out as well and would never comfort me or anything just let me cry and apologize to him when I shouldn't even apologize, I left him because he would get really aggressive when things won't go his way the way he wants it ,he'd punched a hole in the wall or bang his head on the door and it would scare me when he'd do it cause of his facial expression he would have would be angry, really angry, and so I couldn't handle it anymore, him accusing me and scaring me and making me cry during my pregnancy when he knew I could lose my baby from not taking care of myself, making me cry and messing with my emotions, also when I left him 2 days later he txts me with really rude names calling me a bitch saying I've made a big mistake leaving him and calling me other names I rather not say, and now since his true colors came out even more, is it rude for me not wanting him near me or the baby or anywhere near when I give birth or want the baby not to have his last name or not tell him when I give birth? Even though he says he wants to be in her life and now telling me I've made the right choice as to leaving him and him accepting the decisions I've made? And now all of a sudden being sweet to me....during my 2 month pregnant he made me constantly cry and would yell over me when I just try to explain and let him know not to yell when I wasn't even yelling at him when he would be upset over something I don't even known, also one time I wanted to go to the bathroom to do my business as in pee and he'd follow me and then I'd ask him id want to be alone in the restroom and he'd assume I would be cheating when I never even had any phone on my it was on the couch he still budge in and not leave and would get angry if I told him if he can wait outside the door and wouldn't he close the door and started getting really And saying I was hiding things from him when he is practically with me 24/7 and this time he grabbed onto my wrist and I started to get scared assuming he was about to hit me or something, started to cry and I asked him to let go of me and he locked the door and started telling me to stop crying and shut up and so at this time was the first time I yell at him to let go of me because he was tightening his grib, I guess to make me feel scared and when I told him to let go of me he got really upset and forcefully swung up the door and left to the garage that's when he punched a hole in the wall and practically destroyed all of my personal things and some furniture to the floor and wrong on the wall there is no us, and left without telling me where, but idiot me thinking he'd change his ways for me, when he came back I took him back In, but he never once changed when itwould constantly keep happening expect he wouldn't break things he'd punch himself or bang his head to the door, so now after so much hurt I've been going through I don't want him near me or my baby or to have his last name. Any thoughts? Or opinions?  Also I left him when I was 3 months and now I'm very very happy and feel safe with my desicions on leaving him, his father also told my parents he had to go get help with his anger because he punched his father, I also witness him push his 14 year old sister roughly. Stopped him before anything got out of hand, was frightened and scared, thinking he'd hit me or push me out of the way, has told me everyone of his family is scared of him.