Your mind can be a dark and scary place.
Alone with only your worst thoughts stewing in your mind, the entire world feels like a prison. Your every problem is magnified to impossible proportions; you feel like you’re up against a suffocating wall with no weapons to fight.
A part of you is aware that your problems would be seen as trivial by other people. “It’s all in your head!” they’d say. But it’s not trivial, because they don’t understand that your head has become your enemy, and that it’s with you all the time. That’s why you never tell them. You never tell anyone.
And eventually, you snap.