What hurts the most?

Never know loving someone can be so difficult.
Never know you would change so much in just afew months, so scary.
Never know so many things would come in the same time.
Never know why our happiest moment are shorter than rainy days.
Never know my heart would ache so much each time you used those words on me.

What comes around goes around.
I've got to blame myself for all this , cause that's how i treat people in the past.