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?
Social anxiety disorder
Social anxiety disorder (SAD), also known as social phobia, is an anxiety disorder characterized by a significant amount of fear in one or more social situations, causing considerable distress and impaired ability to function in at least some parts of daily life. These fears can be triggered by perceived or actual scrutiny from others. Individuals with social anxiety disorder fear negative evaluation from other people.
Physical symptoms often include excessive blushing, excess sweating, trembling, palpitations, and nausea. Stammering may be present,
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