You said you had a lot of friends up until 8th grade. I don't see how you won't know how to make friends.
I plan to not get married and plan to die alone. And for all its worth, I can still make friends.
I am curious to see the 6 years of introverted effort you have developed of your art. Maybe you can post some of your work? I have only spent 3 years of introverted years semi-consistently pursuing representational art.