Can't forget

Why can't I forget you
I try so hard
I'm with someone else
I don't want to remember
Or think about what might have been
And yet your image comes still
Unbidden
When I wake up at night
As I'm falling asleep
Or during the day
When I am going about my life
Trying not to think of you
A glimpse of something
A sound
A smell
And it all come rushing back
So strong I can barely stand under its weight
And so I sit here
And ask myself why
Why
Why can't I forget you