What should I do? Can I sue him? I can't re-home because he took all my money for rent.
If your life is being threatened, call the police.
This answer is provided for general information only. No legal advice can be given without a consult as to the specifics of the case.
You don't indicate whether you are a minor or an adult. If you are a minor, you should talk to a school counselor or consider contacting child protective services. If you are an adult, you need to start looking for a new place to stay.
You can sue anybody for anything, but the amount you could possibly recover based on a verbal threat with no physical injury is minimal. That's not going to end up providing you with any sort of financial windfall.
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