They still hold hands after having been married for fifty years
All the while bickering like newly weds, that is commitment
"I'll be waiting", she says as he ships out to fight a war
She waits for his return in fidelity: that is commitment
Her partner is slowly dying, each day another part shuts down
She stays by his bedside until the end: that is commitment
Commitment is what you do when you love someone
It is a promise of a life together until the end