I am also ambivalent about a protection order, but never heard of you having to face someone in court to do that, but that the police serve it through the court for you.

You really need to discuss your fears about it backfiring, with your T, and ask what experience she has with them.
It's always tough to be triggered, and while you may be healed at some point, there is always the chance you will be triggered in the future. How much you heal though, will lessen the response you give to the trigger.

If you file an order of protection, then IMO, that gives the abuser the knowledge that he/she is getting to you really severely. I really don't know about this for you. If the person is constantly coming around, I guess you have no choice but to file one?

Make yourself as safe as possible otherwise...and know you will get through this. (((safe hug)))