Learned hes been on dating sites half our marriage

he claims he did not know they were dating sites....

He looked at me and said don't be going on there looking at messages I have done nothing wrong....

I cheated, however he has been on these sites for 7 years, I cheated 8 months ago. He says I cannot ask questions about the sites as I am trying to make my one time affair OK. Thats not true.

Is him being on these sites a form of cheating?

He gets deflective, pissed, says it puts stress on him when i bring this up which has been 3 times over the last few weeks, he says the stress is too much to handle, he says bringing it up and cheating on him is too much to handle, bringing it up is pushing him over the edge and he thinks that is what I want. I don't....

I was transparent, honest, open, remorseful for my affair, ya ya burn in hell i know....