How can you tell me to do this?

I'm doing the best I can, but I’m startin' to understand
The best I’ve got ain't getting me anywhere
I'm fightin' with all my might, but when I’m alone at night
Your memory is more than I can bear

I make it a little while, without thinking of your sweet smile
Then suddenly I see you in my mind
Keep telling myself you're gone, keep saying I’m moving on
But everyday I’m falling more behind

You said I’d be fine but you were lying
Cause after all this time it feels like dying

Trying not to love you is like trying not to breathe
Something that I haven't learned to do
I can't stop believing you're everything I need
That's a place my heart just won't go to
Trying not to love you...