He doesn't wanna wear a condom

So I've known this guy for almost three years. Three long amazing years and we only recently started dating, the only issue is...he lives in the state next to me so we don't get to see eachother as often as we'd like. Im planning on loosing my virginity on Valentines day when he visits ☺ He admits he's not a virgin and has had sex with his ex's.....all unprotected. Every time I mention that I want to use a condom, he gets defensive and says it'll be fine and that he doesn't have an STD. But I don't know that for sure. I really like him, but I just wanna be safe. Any tips on what I should do or ask him so he can just use a damn condom?...