Caregivers rock!
Young, old, rich, poor, wherever you're from or whatever you've done, caregiving is a kinship. Never be afraid to ask another caregiver for help. There is a Caregivers forum at the ALS Forums and in many other channels.You will have good days and bad. You will never get enough sleep or burn off enough stress. But you are doing something uniquely important, that will help sustain you through the loss and memories of your PALS. So keep it real, and don't try for perfect.
ALS takes a lot of energy from the person who has it, and often empathy is depleted as well. Sometimes it can be hard for them to accept and acknowledge the amount and kind of help that you provide. So on their behalf, thank you.