Back when I was in the army, I had roughly three months and one day where I was in bliss.
The three months are from my ex. We dated for a while when she had a tourist visa and just randomly popped out of nowhere. It's cringey, but she really was like no other woman. Didn't care for sex, didn't dislike or disrespect me because I was a terrified kid who knows nothing of how to approach a woman and making it suave. When she left, I almost ctb in a port-a-potty back at base. My CO caught me literally a second before I squeezed the trigger. Looking back, a 5.56 to the front lobe would do a lot of damage, but is survivable.
The one day comes from a day I almost killed a dude. Left him scarred pretty bad and got kicked out of the army, though, so there's that. More satisfying than happy.