Your brother sounds like a piece of work. I don't necessarily agree with what ThunderBow said, though. If you have a diagnosis, you are ill, and also in many cases when one doesn't have a diagnosis, too. However, mentally ill does not equal selfish, self-destructive, or irresponsible. Your brother seems to be a narcissist, hate to say, but it may be true. Those kinds of people almost never change; they often end up being very lonely people, because nobody can stand them. I would suggest not giving your brother any of your time from here on out. Please use that time instead to look after yourself well and care for yourself, you are worth it. Mental illness is not a character flaw, but a problem which many face, You deserve to be taken seriously.