Happily Doomed:
Describes the state of knowing you are instantly doomed by something out of your control, but happy with the thrill it brings. It's knowing there's a risk, but the Dopamine hit is too good to turn down.
Often
associated with
falling in love ... or that moment you let go of that rope / step out of that plane etc. when your dumb mate double-dog dares you to.
The feeling often happens on
the day of your wedding.
Commonplace with the ADHD urge of MUST DO IT NOW!