I think the worst thing about growing up introverted is feeling like there isn’t a single person I can talk to about the deepest, darkest thoughts I have. All I need is one friend who I feel OK with being completely open about. When I was small, I didn’t have Thoughts. But after more life happened, and left me with Thoughts, I realized there was a gap in my life—I hadn’t cultivated a friend who I could talk to about these Thoughts. I had friends in various settings, whom I revealed different parts of myself to, but not a friend with whom I felt I could talk about Thoughts. And when the Thoughts left me desiring a Friend, it was hard to find one on demand.
A word of advice: find a Friend who you can talk to about Thoughts, before you grow up and it becomes harder. All you need is one.