Can he? Sure. He has the ability to do so but it would give you grounds for a lawsuit for doing what is illegal.
He would have to give you 15 days written notice. See the PA landlord tenant statute Section 250.501(a) and (b):
https://www.thelpa.com/PA_landlord_tenant_act.pdf
I agree that there is nothing in the law that requires you to give notice. You may leave at the end of your regular rental period if you like.
No.can I be legally forced to stay?
All of the problems you describe are indications that you were foolish to get into this deal in the first place but I am sure you can provide all the excuses you had for thinking this was a good idea at the beginning.I want to rent a room
And now you want to "rent a room" again.
You need to understand that renting a room in somebody's house exposes you to the same potential issues in the new place that you had in the old place and the classic definition of insanity is "doing the same things over and over and expecting a different result."
Up to you. Just felt compelled to explain the risks.

