Welcome here Sam,
You chillingly remind me of my former drinking buddy. He lived like you are, doing great things through the week but really, just waiting for the weekend so he could drink. Then he would tie one on until Sunday night when he would have to suffer the hangover till the next weekend.
He finally got sober and stayed that way for 5 years. Then one Friday he called all his friends to tell them he was going to Iowa to visit his daughter. Monday morning he jumped off his 11 story building.
You can do this. I am trying to make this Day 1 again after a relapse, so we can stay sober together.