When your girl leaves you for another dude for any number of reasons. Sometimes it’s because she can’t handle you being away so much, she can’t take care of herself, you didn’t call her enough when you were in bumfuck no where in Afghanistan with no phone, you have PTSD, and/or she’s just a total fucking whore.
I can’t believe she just hit me with a Dear John. I had just bought a ring and was going to propose when I got home. Oh well, maybe I’ll just die on this deployment and my problems will be over.