OP, this was me 6 years ago.
My DH (we are married at least) made me feel guilty for wanting to go back to work, that I was just trying to get away from my own child etc.
I compromised and went back to work 2 days a week. I also had another DC (I know, I know... )
I am now trapped.
I cannot find a non full time job, my prospects at my current firm are shot to pieces.
I do every pick up, drop off, holiday, sick day. I do EVERYTHING around the house but I am still supposed to be grateful because he earns "all"
the money.
The one good thing is he does get up with the DC in the morning before he goes to work as that is the only time he sees them. He conveniently gets home just after bedtime.
I have tried and tried to row back from this position (like you, things were pretty even before DC) we have had so many conversations about it. To no avail. He likes the status quo (and why wouldn't he?).
A job came up in my office but it was full time, I sent the job spec to DH and his response? You would need to ask whether you could do part time. I suggested maybe he could, but his response is he would have to give up work altogether (and we can't afford that, which he knows, and it is his trump card).
I have given in to it for now. My youngest starts school in September and I am going to find a childminder, then I will find a new job. I basically have to act like I am single parent and not factor him into my life Monday - Friday.
DO NOT BE ME, OP.