Responsible

I always have to be strong for my siblings.  My twin sister is emotionally unstable and my little brother, well, he's too young to understand. 
I stayed with my mom right before she went to a mental hospital. I couldn't allow myself to break down.  I had to stay strong for her.  We've never really gotten along but that is probably because our personalities are complete opposites. 
Even around my friends I have to be the strong one.  Talk them out of things, never break down.
It's stressful and that stress is eating away at me.