I wish I could come up with some really great advice or a convincing argument to make you change your mind, but I will say this:
There are people who care about you. Your friends, your family, people on this forum… Your life is valuable, and you are valuable. No matter how rough life gets, a slow suicide (or any kind of suicide…) is not the answer. Talk to the people you work with. You’ve mentioned before that you don’t want to burden them, etc., etc. But do. Friends are there to help you through your struggles, and if they are truly your friends (heck, even if they aren’t and they’re just decent people), they would rather have whatever burden your problems might be than have you disappear from their lives one day because you drank yourself out of this life.
Please, please reconsider. You’ve got decades ahead of you yet if you take care of yourself. I don’t know what exactly is bothering you, whether it’s losing your friendship or something else, but nothing is worth giving up over.
And remember, if you don’t take up drinking again, you’ve always got an extra career option available to you: you could become one of those motivational speakers who go around to schools, then you could sneak in a bit of your music, and before you knew it, people would be paying to go your concerts. 😉
In all seriousness though, you don’t know what life has to offer, so at least give it a chance.