Hi Lost and Lonely.
I think you are doing great to recognize that you are not the problem, your family is. I also think you are in good shape recognizing all of this at 19 years old. I guess the first question I am wondering is whether you are seeing a counselor of any sort right now? I think it is extremely important you have a friend who cares about you and pulled you out of the situation you were in, but it is going to take a lot of encouragement and positive reinforcement to remind yourself not to be so hard on yourself.