Well it seems a little oxymoronish to Kill and be Kind at the same time.but being kind is the right thing to do, maybe instead of killing them they will learn to be kind also, or just be kind in return. The Golden Rule if you will.
The sun will rise again tomorrow, so if something didn't work out today, try again tomorrow or the day after. With chronic illnesses, fatigue and pain will often change or limit your plans. Don't worry--let it go. There's still time.