This speaks to me.

Growing up I couldn't have possibly imagined that my actions would have any significant effect on others around me, I felt so incredibly invisible and meaningless and worthless, I did anything I could to feel like I mattered and to be noticed.

Only now, like 20+ years later do I realize that I myself am sometimes "the protagonist in someone else's movie" who's actions actually make or break someone else's day.

It's such a mind fuck when you realize that you actually do mean something to other people and your influence actually makes a noticeable difference in their life path just as someone else you liked made a difference in yours long ago.