How come I'm like this???

Why can't I work like everybody else?
I complain about the position I'm in yet there is opportunities to get myself out of it, but I go in a circle. I'm speaking about my family and people I have to deal with. I work as a writer at home, opportunities up the butt, but I'm so depressed and lazy. And living with them makes its worse.
People tell me all of the time I complain about the same things over and over again, never do anything about it. I'm 27. I have a fiancé that tells me the same thing. What's wrong with me? My family keeps taking advantage of me, I don't pay rent but I do help, they treat me like crap. Can anyone help me or tell me what to do?