My question involves a roommate in the State of: Texas

I currently have a roommate which is very verbally abusive towards me and has major anger problems, we believe he is bipolar as well. He is a month to month tenant and I have served him with the 30 day notice to vacant. Which now has made him very furious and now constantly will verbally abuse me as I walk to the bathroom, talk to my other roommate as well he will come up to my door and just start calling me names and continue to verbally abuse me. I don't know how much I can take this. I don't feel safe in my own house. I am now stuck in my room in fear of him. I was told that I could get a protection order against him and he would be forced to leave or be arrested. Is there any truth to this?

I will add he is not an authorized subtenant, not approved by our landlord, our lease states we are not to sublease a room.

Any help would be greatly appreciated, I fear for my life.