Married but I hate my life

I’ve been married for 18 years and we had our first kid a year ago. Ever since my son was born my wife has just been an unreal person to deal with. She turns on me like a snake and any little comment gets construed as some offense instead of a discussion. I’m exhausted I hate being home and I’d rather be at work or worse just a bar alone. I just really want attention from a someone of the opposite sex I guess. All I get told now is how crappy a person I am despite working 72 hour weeks and making 6 figures. It’s a two way street but I really feel like I’m being treated like crap. I never bring up money etc and I try to play with my son as much as I can before i pass out. Just lonely.