If it were me?

I would make every attempt to file a protective order at this point, honestly.
The procedure and what situations apply vary from place to place- I would pursue that into the ground though.

It's not a matter of being 'mean' to this person, but a matter of protecting yourself at this point.

You have no idea how to predict this person's actions.
Though an order of protection doesn't always do something in itself [unfourtunately], there are various details, depending on the order- if any part of the order is broken, it will be out of your hands whether charges are filed if it is reported because it is a court order. But to be honest, at that point it would be necessary to file charges.

A lot of people may say to pursue that would be to overreact.
i would be willing to bet many of those people have never been in a similar situation.

[I have. at least investigate whether your situation is eligible for a restraining order/order or protection and make some sort of decision with that information. please.]

ETA: you should be blocking this person every way possibly imaginable throughout the internet at this point.