I have a pretty simple mindset about it all. What's mine is mine, and what's yours is yours. I own my emotional stuff, you own yours.
Once you start to take control of your happiness, you may get some backlash. You must resist the temptation to cave in to the backlash. This is not "going out and being an alpha male and doing whatever the heck you want". This is owning your own happiness, just like every human being has the right to do. It helps to also have faith that this will not just help you, but it will make all your relationships healthier, including the one with your partner (even if you end up splitting).
What makes you happy? If you don't know, start with little things. Experiment. It can be really really small. I started buying cage-free eggs. It took literally zero effort or time. But the difference in taste when I have eggs in the morning is priceless. It makes me incrementally happier. It sounds stupid... I would have never started doing this until I went through my situation.
I can't remember if I saw this here on DB forums or elsewhere, but I am a math nerd:
1.00^365 = 1.00 1.01^365 = 37.78
Little changes, over time, add up.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712