numb vagina

My boyfriend isn't exactly small on the nether regins. He's very much so equipped. BUT, during sex when he penetrates into my vagina I can feel the first maybe 3 or 4 strokes then once it starts to get wet I don't feel anything at all during sex. It's like inside me just goes totally numb. Which makes me sooooo paranoid he can't feel anything either. As I do get very wet. He says he can it just takes extra work and longer to cum. Which doesn't help make me feel any better about It. Any one else this issue. Or know what I can do to be less wet and get maybe more friction.