I know. But how?

I know I should forgive. But how to forgive?
I know I should let go. But how to let go?
I know I shouldn't look back. But how to control my mind?
I know I should move on. But how to move on?

Why is she in love with an idiot?
Why am I so affected by her?
Why am I still concern about her?
Why am I still praying for her?
Let that idiot & his family, be cursed into eternal hell !!!!

I know I shouldn't curse. But I can't control.

GOD HELP ME PLEASE