This Feeling.

This feeling I can't shake.
It's like bi-polar disorder,
one minute it's there and the next it's gone.
But when it is there; it takes over.
It consumes me and swallows me.
Only thing is, I don't know what this feeling is.
This feeling is sometimes what defines me;
it makes my mood into something it shouldn't be.
It gives my throat a lump,
it puts me in a stump.
It sucks because I can't shake it.
It sucks because my heart feels broken;
and my life starts to seem meaningless.