The Shape of My Heart

My heart is a confusion:
Sometimes my feelings
aren't more than
a simple illusion.
It's a tricky puzzle
to solve.
It's like a silver lock
without a key:
No one can understand it,
not even me.
When it's broken,
I'm in a mess.
When I'm lonely
It feels like I have
one half less.
Impossible to describe
This heart without an owner.
It's difficult to understand
Why it is so different
Why it's so hard to mend.