Ecnal,
I'm sorry you're feeling so bad and desperate right now. This will get better. you have to believe that. Are you going for any therapy? If not, you need to go. It's really hard to go to someone and open up, but living with this is a lot worse. The first time I went for therapy I was shaking and I just sat down in the chair and started to cry before I could even get any words out. Don't worry about looking silly, they've seen it all and heard it all. I once heard 0119 defined as "a permanent solution for a temporary problem" and that really stuck with me through some of my worst times.
I know what you mean when you say that drinking makes you feel much better and comfortable. I used to feel the exact same way and drank too much in my 20's. The downside to this is the mood swings drinking leaves you with for the next couple of days.
Strangely it's common for people with social anxiety to be well liked, funny, and even to appear outgoing. People are often surprised to find out the extent of your discomfort. The way out of this is to be really open and honest about how you are feeling. The more you admit to it and let it out in the open the more it loses it's grip on you. Seems like the opposite would be true, but it's not. Just go and do the things that make you feel uncomfortable and tell people how you feel. Give yourself permission to leave a place anytime you want to. Just go and try, even if it's for a few minutes. Everyone with social anxiety worries about being scrutinized, but just remember that whatever someone thinks about or says about you reflects them, and really has nothing to do with you anyway. You have no control over it, so just let it go.
People here are probably sick of me recommending my favorite book, but you sound like you could really use it so I'll tell you too. It's a book about releasing feeling called "The Sedona Method" by Hale Dwoskin, available on Amazon. It teaches you how to release all those built up feelings that overwhelm you and drive your anxiety. Please buy it and start reading. I found this book when I was 35 and would have done anything to learn this earlier in life. Hugs.
Rachel