Just a month ago she was worshipping me but she suddenly got paranoid that I was about to leave town (I will, but prolly not until September) and started formally dating some orbiter who had spent the 4 months she spent fucking and blowing me blowing her phone with texts. After that I've asked her to hangout twice, one time she brought up lame excuses and the other time she didn't respond (she didn't say "I have a bf now, pls stop" tho). She knows I'm not looking for a relationship and I'm guessing she prolly freaked out because of an excess of dread.

What are the chances for her to boomerang and what's the best course of action to make her do so?

Scarcity and mild oneitis, I know, but this is really a small town, a rather relationship-minded country and she was a very good plate. As for the BPD, only negative symptom I saw in my time with her was a tendency to shit test in a rather aggressive, but also obvious and naive way so I think I could keep handling that.