Bf Keeps Asking To Have Sex...

I’m 16 & my bfs 18. We have been together for 9 months. For the majority of the time we’ve been dating he keeps bugging me to have sex even tho time & time again I’ve said I’m not ready ( and I’m worried abt pregnancy) He’s a great bf and I love him & I want to make him happy and have sex w him but I don’t like that he’s making me feel pressured. He knows I don’t like it when he keeps asking but yet again the other day we were making out on his bed and he asked if I wanted him to grab a condom. Advice? Thoughts?