Abuse? Am I wrong?

My boyfriend gets so angry, almost like he throws temper tantrums. I don't know when he's going to snap and take it out on my. He's kicked me, thrown pillows and blankets at me, pushed me, beat the crap out of my arm while I was driving on the freeway...idk. Some of that stuff he did obviously didn't hurt but just that fact that he would do it sucks. That he could raise anything to me and think that it's totally okay. I flinched because he was angry that I woke him up for work, and started kicking and screaming like he was 2. I told him my phone was under him and I shut off the alarm he asked me to turn on (I thought he would wake up to the first one) and he looked like he might throw it at me so I flinched and he said "you act like I'm going to hit you or something" and then threw a pillow at me as I left the room...so I said "prove me wrong" and he said "I'll prove you right". Sorry I'm just losing it at this point, idk what to tell him. I do everything for him. I'm 20 weeks pregnant with our first child and I'm scared that he's never going to grow up, and that even though sometimes he's nice and respectful that isn't enough.