I think it's wise to just tell them exactly how you feel.
"I'm a bit overwhelmed right now, could you please give me some space without judging and giving advice? Thanks." Repeat as needed.
The biggest thing that I notice in your post is that you seem to feel responsible for a lot of peoples' actions and that there is some way to get them to understand or to back off. I find that is not realistic in my life. People show their concern in varying ways. It's up to me whether to take that on board or to ignore them. (Politely, of course.)
I also don't talk about sensitive stuff to people I'm not sure I can trust to react in a loving non-judgemental way.
I agree that you would benefit from spending some time on this site reading and/or getting back into rehab/AA/counseling.
Job #1 is to put down the drink. Everything else is noise.