I developed social anxiety in 2011, I was around 18 then. I was at my lowest. I got really stressed out just by being close to a window in my moms apartment. I got help but most importantly I grabbed the bull by the horns and as time went by I got enough courage to go to the grocery store with people, which ended up with me being able to go alone, I later could go on to see the movies and just the other day I went to go on a cruise ship alone. Take the steps you feel are uncomfortable with but possible with.