I understand how it must be difficult for you, I have a friend who was facing the same problem and was getting depressed day by day. But now she is A-okay. Because she was motivated by some of the people she used to know and they helped her a lot.
So, I guess what I am saying is you need some kind of inspiration or someone to guide you. Look at Famous
Ryan Hudson Peralta, his father left him and his mother because he was born with a disability. But still he now a very successful motivational speaker and an artistic web designer. If he can do it in a wheel chair, why can't you?