Her.

I don't really want to, but it's for her sake

She needs all the attention here, because she gets none at home

So for now I'll stay quiet, even though the things in my mind are loud

I'll wait patiently, even though time is running out

I'll do stupid things to make her laugh

I'll stop saying so much, so she can say it all

I'll smile and laugh at her jokes, even though I want to cry

They don't need to know what I know, because I need to become a side character

for her.