Mate, you could have described much of my life there. I'm sorry to say it's time to move on and find yourself again, build your own life. I had this treatment for months/years and then discovered my (ex)Dw was having an affair.
I'm laid back, caring, sympathetic, do my best to be a good dad, worked incredibly hard etc. I put up with years of criticism (when I call this out, she was just 'making a comment) and god knows what else. It just wasn't good, and I was getting to the point where I couldn't carry on. On top of that No affection, or intimacy (let alone sex! none in 4 years!)
In a way this OM has done me a big favour, he's caught a bullet for me, and I'm outta here, I'm moving out of the family home (nothing in this house me, the decor, the furniture, even the kids toys aren't my decisions) and I'm damn well going to build myself a new life.
It's scary as hell, I won't lie to you, but seriously mate, you should do it, grab your life by the horns, it's worth it.
All the first bit (Which I'm going through still, 7 weeks on) is bloody horrible and painful, but I'm starting to see all the positives.