Man, I was and kinda am exactly in your shoes!!
I was really unstable but I realized I don't have what it takes to CTB so the only option was to fight these terrible enemies: DEPRESSION, ANXIETY, ALCOHOL AND SUICIDAL THOUGHTS.
I'll start off by the alcohol:
I'm still drinking but I don't drink "strong drinks" anymore. I drink low alcoholic grade drinks such as beer (before it was vodka and champagne) and I try not to do it every day. That's actually a lot of progress for me and I think you can do it too.
Also, do you take any meds? A psych could help! I wasn't able to sleep but now I can at least sleep for 5-8 hours thanks to some pills! Sleeping will allow you to "turn off" your brain and the following day be a "more functional" being.
As for depression, anxiety and ctb thoughts, they're in my head all the time. It's a daily battle but whenever I feel TOO DOWN I just go for a walk or watch anime or something! DON'T STAY IN BED! That will make things worse!!
Hope to have helped you somehow,
Hugs and love,
Matt