What do I do about my twin brother?

He's autistic, has ptsd and lives with me and my fiance. Basically he has these bouts where he threatens my fiance and himself so a month ago we sought out a facility to put him into voluntarily. He went for three weeks but it's been extremely difficult for me to care for him. I moved out of my guirdians... show more He's autistic, has ptsd and lives with me and my fiance. Basically he has these bouts where he threatens my fiance and himself so a month ago we sought out a facility to put him into voluntarily. He went for three weeks but it's been extremely difficult for me to care for him. I moved out of my guirdians home to get a place with him since he was being kicked out of his home. We were both 18 now we're 20 but I have my own issues to deal with and it's becoming way too much. I'm not sure what to do
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