It’s too big😮

So I’m with someone that make me happy every single day. He makes me laugh, he sends me treats and lunch to work he works out with me and he teaches me different things all the time like changing oil and tires. The only issue in our way is my small vagina. I’ve known for a while( from my dr.) that my vagina was small. I don’t want to feel like I don’t want to have sex with him but his dick is too big. I know people say “ there’s no such thing” but it is. That shit can kill somebody lol. What should I do?