You’re welcome, make sure he’s aware of your boundary and ALWAYS pull through with the consequence- as a teacher I am telling you this is extremely important.

He swears aggressively- stay overnight at a friends. Doesn’t matter how much he apologizes and begs for you to stay, if you give in then he knows he can continue that behaviour.

Just be calm “I have told you my boundary, you crossed the line- I’m going to be staying away tonight and I’ll be back tomorrow to discuss this”.

It would be tough but I doubt you’d have to do this more than 1-2 times before it’s a very, very real boundary that he won’t cross again.