Help!!! Boy advice neeeded

So this guy and I were about 2 hours in to a very steamy make out session. And as he is pulling my pants down, (I’m already half naked), he cums. With his pants and jeans still on. Obviously I totally get that he would be embarrassed by that, but it happened, and I don’t care. I’ve told him so many times that it didn’t bother me etc, and I’ve tried to be understanding, but he’s just so mortified. He won’t even speak to me anymore, can’t look me in the eyes. What can I say to reassure him? All advice welcome 🙏