I have social anxiety disorder where social situations cause me stress and it's hard to function out in public sometimes.
Have you gone to a therapist who is able to help you with that? 
I've thought about it, but for now I'm trying to self medicate. When I'm out, I make sure I have plenty to drink (alcohol)
It's always good to be able to loosen up when in public, but it might not be the best long term solution. Why do you think you have such an issue in public settings?
I think it's because in my head, I think everyone is judging me. I just start to sweat and I get sick in my stomach. 
I can relate to that, especially when it comes to meeting new people. Do you feel more comfortable once you get to know people?
along with rapid speech. Panic attacks can also occur under intense fear and discomfort. Some sufferers may use alcohol or other drugs to reduce fears and inhibitions at social events. It is common for sufferers of social phobia to self-medicate in this fashion, especially if they are undiagnosed, untreated, or both; this can lead to alcoholism, eating disorders or other kinds of substance abuse. SAD is sometimes referred to as an "illness of lost opportunities" where "individuals make major life choices to accommodate their illness"
particular about what roles I'm choosing. I think as an actor you have a huge opportunity to find yourself through the roles that you choose. I think it's my time, right now in my life, to figure out who I am and what I am and what I want and what this industry means... Why not sit back, slow down, realize I'm 19 and go, 'Hey, let's make stuff that really, really hits hard with who I am and helps me figure out what it