Pregnant at 20 with bf of almost 6 years.

My bf is 21 and I'm 20. He lives with his family and I live with mine. Neither of us have jobs. I'm taking part time classes at community college. We have been on and off for almost 6 years. Now I'm pregnant and we're both excited, but nervous. I live with my dad, and he's so upset. None of my family want me to give the baby my bf's last name. He hasn't found a job yet. He hasn't really ever talked about marriage. He wants me to mature first and do more for him. Idk what to do. Should I give the baby my last name or his? Anyone, please, give me advice. This is such a stressful time. My family hates my bf and made him feel like they don't want him around, but he will be anyway. They don't want the baby to have his last name because my dad will be the main one supporting it. Idk what to do. I know stress isn't good but I'm beyond stressed. Help.