Our expert says:
She apparently has major problems with the rest of her family, and sounds also immature and demanding, self-pitying and over-controlling of others. That she needs to sort out on her own and with her family, and in the meantime, she really doesn't sound fit to form any even semi-serious relationship with anyone else, such as yourself.
As you are not a trained therapist ( and indeed, even if you were !) this is not something you can or should be trying to sort out for her. She has to want it sorted out, and then to do so with expert help she selects herself and works sincerely with.
You have placed yourtself in a no-win situiation, and should look for a graceful and safe way to gradually withdraw, without allowing yourself to get drawn into the family squabbles.
As it happens, I agree with Maria that if this is HER house, its entirely up to her whether she evicts her brother, for any reason she fancies, and she has no duty to support her family, especially if they are ungrateful and shout at her. It sounds as though you have been taking sides in the squabbles.
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