If I did stay, I'm trying to work out what I'd say.

"I love you", "please stay", or anything along those lines is clearly out.

"Have a nice life" is just passive aggressive, and "it's been good/interesting/a slice" just seems trite.

"Goodbye" doesn't seem like enough.

"I hope you find what makes you happy" might work, but I'm not sure.

How do you say goodbye after 10 years together and 4 years married?

M - 34
H - 36
Together 10 years
Married 4 years
BD - March, 2014