I had a lot of anxiety as a child also and never learned to fit in with social situations until I went to college and hit the party scene.
I was bullied excessivly starting in kindergarten. My dad thought I just needed to learn to punch and beat those 9 and 10 year olds up (I was 5). He put boxing gloves on me and told me I needed to learn to help myself and that was that.
I didn't understand any of this, I only knew big kids were holding me down and intimidating me until I cried and I had no way to stop it. I was powerless and figured it was my fault. Ended up being bullied for years and am afraid of people as a result. Drinking was certainly my coping method for this. I was never actually able to even talk to anyone about my childhood until I told my wife a few years after we were married, I always felt it was really my fault.