Mad at me for “backing off”

I admit - I am partially at fault here. I didn’t insist on more details and more clarity. I simply took his word which is naive of me. So I will admit I’m partially to blame here.

He said he was divorced - and he in fact is not I now know. He’s legally separated but the divorce is not final. I never asked never went further when he said “I’m divorced” and I should have.

So my relationship with him was a lie absolutely and essentially I made myself the other woman. I feel guilty - but again I know it’s on me too. He lied yes but I could have insisted and pushed hard for the truth the facts etc.

So now that all this is brought to light (it came to light this week when she has been blowing up his phone begging for him back)

I needed space to think and clear my own head feeling an overwhelming sense of guilt for allowing myself to be this woman - the woman all women hate and resent.

And he is now pissed off at me for “backing off” and “being weird with him” and how it isn’t a big deal because “he doesn’t love her” and he only want to “be with me”.

He’s so mad at me. What do I do? I thought backing off was the correct thing to do in this situation??!!