Well I'm sure I'm right. :) I know it feels awful to feel like you are a burden to your family but they could be growing in ways you can't see in walking through this suffering with you. God can use their suffering as caregivers or in whatever other role they have in walking through this with you for their good as well.
I know this one is overused but I personally never get tired of hearing it. It always puts things in perspective for me:
Romans 8:28
28 And we know that God causes all things to work together for good to those who love God, to those who are called according to His purpose.