Advice maybe?

So i started talking to this guy, and the previous girls he used to talk to and hang out with he had sex with and i told him i wasn’t really ready. and he knows i’m a virgin. we hung out a lot and he really likes me and i like him. and i feel like if we date further down the line then we may potentially have sex. 1. i’m kinda scared and 2. i’m not on birth control and i feel like a condom doesnt cut it. idk. maybe i’m overthinking it. any advice? ( i’m 16 and he’s turning 18.)