AITAH for leaving my wife, stepson, and everyone behind to start over?

Background. My wife and I have been married for nearly 7 years. She cheated on me with a coworker of hers about 5 years back. I've been suspicious for the entire year that she was doing it again.

And I was correct. Not sure with who but she lies like a rug now and takes zero response. She blames me for her actions. I've been an utterly trainwreck. Depression, too much booze, anxiety through the roof. All because I knew what she was doing but she gaslit me to the point of near insanity.

So, she doesn't want a divorce but wants a informal separation. She wants me to get another apartment or house nearby to remain as a family.

Our son is my stepchild. His father died before he was born. I'm the only dad he's ever known and he is my only child.

My wife wants me to continue paying on our home (I make much more than she does) and pony up more money so she and my boy can continue the lifestyle that I have provided them for years.

I don't want to be a cuckhold for her ever again nor do I feel I should be obligated to giver her anymore love or money.

So, am I the asshole for planning on moving to another country to restart my life at 53? Or should I stay put and continue to be treated like this?

Much luv and thanks in advance.