He doesn’t cum inside me

I’ve been on the pill for over 4 months now and I’m only on it so me and my boyfriend can have safe sex as he doesn’t like using a condom. Since then he’s never cum inside of me even though I’ve told him multiple times it’s okay to. It really gets me down that he doesn’t. Is that weird that it gets me down? And how do I show him that it is safe to and that I won’t get pregnant?