I have about 6 or 7 more to go. I right with you JC. Im at an impass...
I had been there. thought about quitting a hundred times but the family comes first with me and the thought of "letting the bastards win" kept me going and I am so GLAD I stuck it out.
over 2 years retired and loving every minute of it.
If i were you i would surround myself with positive , happy , people . read inspirational self help books . books like the Power of positive thinking, and books like that.
watch movies with the theme of never quitting like Rudy, Invincible , Shawshank kept me going......movies like that. binge watch movies and books of inspirational people.
Being a feeder driver is not too good for your physical being so maybe you should go to the gym or go for brisk walks to get those feel good endorphins going thru your body. that may also help.
I DON"T want you to quit and I bet most people here don't want you to either. You have made it this far , you can go a little further.
good luck.