Losing virginity

So I'm 17 and I have been talking to a guy and he knows I'm a virgin and he wants to have sex. (He doesnt want to have sex just cause I'm a virgin. I told him I was a virgin after we brought up sex) but I'm scared because of what he might think of me naked ?? Like I'm pretty confident but what if he doesn't like what I look like? Like should I grow some balls and go for it or tell him? Please help!!! (And I really don't believe that you should wait until marriage so please don't comment that)