I was diagnosed with ADD back in 1995 when I was twelve because I daydreamed a lot in class. Three of my teachers were concerned, and brought my parents in to discuss it. I went to a child psychologist, who treated me like crap and was diagnosed with ADD. I was medicated, and I went from being a quiet person to a raving lunatic with one medication, and another turned me into a zombie. My mom (against my dad’s wishes) took me off of the medication. I still daydreamed in class, but to a lesser degree after going off the meds.

Now I’m sort of a social avoidant..

I was always an introvert, though..
but I didn’t dislike people, so I guess I was probably considered friendly and sometimes likable.

I was same way!

I know I’m kind of late to this article, but I felt a need to respond to your question (hope you see it) I am an introvert, and I believe you can also have ADD but probably not ADHD. I was told as a kid that I couldn’t pay attention in school and focus. I was always “day dreaming”. It was true, I was and am always in my own mind. It wasn’t that I couldn’t pay attention, I just couldn’t in a class room. Through grammer school and middle school I got good grades, but felt it getting harder and more overwhelming as I got older. I hated being around so many people. At home I start projects(cleaning) but go from one to another (not finnishing any)and get overwhelmed. I know, I am an introvert to a tee with ADD. On a side note I never understood why in an emergency( even kaotic) I’m always able to focus and step up and take over. I don’t shrink back.