You should seek out real help, either a therapist or marriage counselor. There's no actual reason for you to stay in your current broken state. Your made up reasons are equal parts bullshit and naivety.
I grew up with divorced parents who were together longer than they should've been and let me tell you, kids know. They absolutely know when their parents are together but can't stand each other and what's worse, they may assume it's their fault.
Kids are more perceptive than anyone gives them credit for.
Edit: "around here" being Australia and New Zealand
I grew up with parents who divorced when I was 18 months old when it became clear they did not love each other anymore. But they both wanted the best for me, and didn't do the petty shit I've heard about other couples where they shit-talked each other to the kid or something. They split time with me evenly.
They both eventually got re-married and are very happy and I have no regrets about how my childhood went in that regard.
You are choosing to be a victim here.