How to not fuck up a new relationship

I have a lot of self esteem and confidence issues and I know my bf is trying to protect me by saying that he’s okay with the fact we haven’t slept together yet (I’m a Virgin)

But yesterday I gave him a bj and he said he came, then he went to the bathroom and I kinda got all self doubting being like are you sure it was okay and such and he said it was.

I’m worried my self doubts and issues are going to upset him.

Help!