Advise

So, this guy and I have been talk for a little bit. We met today and had sex, cuddled, kissed, and just hung out. He made a comment about something that was about another girl. We aren't exclusive or anything. It upset me just a little. I like him and he said he likes me more then he thought he would. He wants to hang out with me again and said he had an amazing time with me. I'm trying to keep my cool and not overwhelm him, but I don't know how. Lol help!