Don’t know how to feel.

I went to school with this guy from 4th-8th grade. Then he disappeared. Well last Thursday he added me on fb and we started talking, we hung out Friday and things moved pretty fast and we ended up having sex after hanging out for 8 hours. After we finished he just wanted to lay there and hold me and talk which I am NOT used to at all. He’s texted me constantly since. We hung out again yesterday and just laid in his bed and watched movies (he let me pick everything). We eventually did end up having amazing amazing amazing sex 2 times and each time he just wanted to lay and hold me etc. after he took me home he was texting and told me he’s trying to get his brain and his heart on the same page and that he missed me and is super attached to me.

With that being said I’m not sure how to feel, I’m not sure what he meant by the brain and heart thing.

I know I’m getting attached fast and it’s scaring me.

Opinions please.