How?

How?
Can you tell me?
Does anyone know?
How do you un-love
The person who completes you,
After they leave you?
Can you?
Or do you go after them?
What if they reject you...
Again.
Some days,
All I want to do is forget.
Forget everything...
Every feature of his face,
The things he taught me,
The pain,
Oh, the pain from when he left me.
The love I felt,
That could not be replaced by any other.
I wish I could let it all go,
Forget,
Un-love,
But I don't know if I can.