A wave of nostalgia

It hits you when you least expect it,
The wave of nostalgia, that is. 
It rolls in your stomach 
And weighs on your heart.
Permitting fleeting memories 
To fly by in your mind's eye.
It makes you miss things,
People, situations and everything in between.
Even when you know they didn't serve you well. 
You miss it,
'coz it hits you,
In the faintest possible way. 
Nostalgic moments in language,
When you flip the page of a book or a note.
But it definitely hits you
When you least expect it. 

- Robes of a Muse