Start eviction proceedings to get him out of your house. It isn't a fast process, but the sooner you start the sooner he will be gone. Also doing something to take at least some control of the situation will be empowering, and could make him start acting a bit more reasonable (don't count on that though).
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“If we could change ourselves, the tendencies in the world would also change. As a man changes his own nature, so does the attitude of the world change towards him. ... We need not wait to see what others do.” Gandhi
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