A Mending Before The Ending

The creature of habit,
Occurring throughout the species,
Sometimes shatter what has been grown,
Would rather walk away then pick up the pieces.
Tape or glue,
Some kind of patch to keep it together,
What existed before can come again,
And claim false to nothing lasts forever.
It's not living when two emotion less animals,
Forcefully coexist knowing things are crappy,
Until they give it everything they have,
Working to change  a life so unhappy.
It's said no one ever changes,
But you know that's not true,
When the arrow sticks in deep,
Your already heading a different way,
Just by saying I love you.