I’ve become a background character of my own life?

I’ve been pretty boring and bland my whole life, which resulted in being pushed to the back of everyone’s mind. I’m not known to make many decisions or have much say in what’s happening. I’m often forgotten in many scenarios. I’m not exactly upset about it, it’s a pretty normal occurrence in my life. Honestly, it’s quiet and easy to navigate.

People don’t bicker over your problems, they don’t even realize you have any. I know a lot of people would be distraught over things like this, but it’s become my norm.

But recently a relative of mine brought it up. She said I’m too quiet and I seem to be living by everyone else’s stride. She said I’m always the one taking the pictures but I’m never in them. Apparently I don’t smile anymore (I’m pretty sure I do). She expressed concern over my mental health, saying “I’m not making memories and living the way I should be”. I guess I seem robotic. She ended the conversation with a question I’m not for sure how to answer, which has me on here. When was the last time someone celebrated your birthday without being reminded what day it’s on? You don’t feel lonely having everyone else overshadow your whole life?

I guess I don’t really know. I’ve never given it much thought because it never really mattered to me. I just figured everyone else had more important things happening in their life and it would be okay to put off whatever I had in mind. Maybe I’m the problem? I’m kind of at a loss as to how I should be feel about it. Is she right to be concerned?