A girl neeeds ya help😖😂

So me and my partner have just started getting physical. He has only had one partner so he doesn’t have that much experience with touching and getting sexy. We were having a makeout sesh for about an hour and it got really heated...He plays with my nipple but twists them and pulls them to hard it hurts and rubs down their to hard😓 I didn’t let him finger me because I knew he wasn’t gentle.. He is a muscle boy so I can’t hold back how strong he is but how do I tell him to be more gentle without ruining is confidence. The last time I asked him he said he knows what he is doing😂😂