I agree with the others - love the "dolphin moment" idea! So beautifully put!
Love the note that your post ended on as well. That IS something.
Your awareness and acceptance of the reality of the situation shows your wisdom and strength. Still, it does hurt, and I offer my empathy. When we are with someone, we have hopes for a future. Even when things need to end for us to be as healthy as we can be, it still hurts.
Gotta say, I loved that - "angry biking" - that's great! Get it out, hon!