Accidentally pregnant at 20

Im 20 and my boyfriend is 19, we have been dating for almost a year. My period was late and I was feeling weird/off. I told my boyfriend this and we went to the store where he ran in and picked up a few pregnancy tests. He wasn't scared or shocked which was the opposite of me. We go back to his family's house and I take the tests and while we're waiting he was rubbing my leg and back telling me it was all going to be ok. When I looked at the tests and they all said positive I can't even put into words how I felt but my boyfriend still wasn't shocked and was very calm. I honestly wanted to be left alone.

This was a round 8pm and it was dark. I needed to clear my head and get some space so I start grabbing my items and the pregnancy tests to put in my bag to leave. He asks me where im going and I tell him that im going for a walk and he tells me "Its not safe out there for you and my baby". Hearing him say "my baby" made my stomach flip in a goof way. We agreed not to tell anyone and we cuddled in bed and he had his hands on my stomach which I can't even bring myself to do because then that makes it real.

It seems to me that he wants to keep the baby and I don't know, im just scared.