I actually currently really like my job and my boss is amazing (a rarity, I know!). I have applied for another job in my field in another state – mostly due to life circumstances stuff. Closer to my ageing parents, more opportunities for my spouse, along with a bit of a pay increase and more opportunities for advancement in a larger organization.
I don't want my boss to be blindsided if I leave but also — don't want to create any unnecessary tensions.