what the fuck

boy do I have a story for you, so last night I had "sex" for the first time with my boyfriend. I'm so fucking confused right now. He thinks it was great 10/10 he wants to do it again tonight. He came 3 fucking times in under 10 minutes and I honestly dont even know if he was in me. I didnt even come close to orgasm. Of course ,being a guy, he thinks he rocked my world. How do I tell him that if we do it again something needs to change.