I read a story within the last year, probably on this site. The main character feels invisible to his peers. He find out he wasn't.
He had a birthday party one of his friend's mother "helped" and deliberately told everyone the wrong date.
Male main character
I believe he was in high school
His friends didn't know how to help so they just kept an eye on him when he drifted into himself.
I thought I remembered a lot more but not at this moment. Do cardiac drugs affect memory and thinking? I don't feel as sharp as I used to.
limab