Bittan, you have made it this far and you havent given up. I cant imagine what it must be like, but.
Instead of thinking you are a liability to your family you may be teaching them the most important lesson of all. Life is not fair, but you can never give up.
You have and are setting a great example for not only your family but for others.
I know you feel down right now but this to shall pass.
I wish there was something i could say that did not sound trite or cheap, but you will be in my prayers as well as your family.