Will he ever change

My boyfriend and I just got in an argument (about making the bed) and now I'm stuck outside with nowhere to go and nothing to do. I live with him and his 2 cousins. My parents kicked me out when I was 14. I'm 17 now and pregnant with twins. I want to raise these babies but it just doesn't seem feasible. I don't know what else to do. I know it's stupid but I can't even explain how much I love him. I can't leave him but I don't know what to do. He's only been like this the past few months. I'll probably end up going to his mom's house for the night. Do you think it would be rude if I asked to stay with her? She lives in 4 bedroom house and only 2 of the rooms are being used. I don't want to impose though. I just need to figure something out. Sorry for the long post. I just don't have anyone to talk to.