When Did Letting Go Become So Hard?

I remember your laugh
I remember your smile
I remember your touch
Though it's been awhile

I miss your gaze
I miss your sweet kiss
I miss being with you
It was unforgettable bliss

I know you don't miss me
I know you've moved on
I know I should forget you
But I'm just not that strong

I still recall the words
I still recall what was said
I still recall the promises
The things you never meant

I'm sorry I'm not OK
I'm sorry I'm not stronger
I'm sorry I'm still in love with you
And I can't do this much longer

I don't know how to live without you
I don't know how to survive
I don't know what it is about you
That makes me weak inside

I'm usually the one who deals
I'm usually the one that's fine
I'm usually OK with break ups
But I miss you being mine

At first it was infatuation
At first it was just a faze
At first it was something I would end
But now I barely make it through the day

I never attached this easily
I never lose this fight
I never let my heart get broken
But now I cry myself to sleep at night

I don't remember it being this difficult
I don't remember not being able to laugh
I don't remember being so distraught about it
When did letting go become so hard?