He was trying and failing to meet your dark humor. Try to cut him some slack

Some people think scars are beautiful because they make you who you are, and that’s the person he loves. Hopefully with time you will find your mojo and nerve to be open and free with him, but I completely understand why it might take a lot of love to make you feel safe.

Do your best to cut him some slack, and realize that he was trying(and failing) to meet your dark humor. Try not to withdraw from him, because that can damage your relationship. It sounds like he is a good guy.