If you are able, based upon the threats you have presented, to obtain an order of protection that excludes the tenant, that may be helpful. However, it is likely that you will have to evict the tenant through the Housing Court. You should consult with counsel.
Please be advised that this answer shall not constitute legal advice, or create an attorney-client relationship.
I am sorry to hear about your situation. You can file in landlord/tenant court to have him evicted properly. If you are threatened you should file an emergency OSC for an Order of Protection. You should also call the police.
You should contact an attorney to discuss your questions as additional information would be helpful.
Our firm has many years of experience in this field.
I wish you the best of luck.
Please remember that I do not normally monitor these questions after I have posted a reply.
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As always, do not construe posts as legal advice but as "attorney advertising" and you should always consult with a lawyer on any legal matter.
All of the above advice is sound. This highlights the potential problems in subleasing/roommates/sharing, etc.