I’m confused with my bf or is it me.

I dated my current boyfriend when we were 16, but it didn’t last longer than a year back then and we weren’t sexually active. I am now 33 and we are trying again. But he recently left a relationship 6 months ago, that he was in for 10years. We are both hot and heavy at the moment for each other, but I admit that I want it more and i want to touch him as we kiss and make out most of the time. Its hard to keep my hands away from that area and from him. We were kissing on the couch yesterday and it ended when he almost came in my hand. He has trouble himself controlling himself with me. We cant lay in bed and just hug and kiss. It gets that hot and heavy, his hand is between my legs doing a great job and he cant take it any more and next thing he is inside me and were having sex. But this yesterday it happened 3 times and it always starts the same way. But today he said that we should slow down and go back to kissing, hugging and holding hands. WTF. Did i do something wrong. Im confused? I asked my boyfriend if he enjoyed it and he said yes. So am i over thinking it ? Is it normal to want to cool it off, when he seems to be enjoying it as much as I am. Any advice?