What V said:
you can either try to take her back and go thru the same vicious circle as you have or let her go and take this as a tough learning lesson of what happens when you are involved with a pwBPD... .
And to be the contraian i would say
or if and when she does "attempt" to come back... .CONFRONT her (usually BPDs hate that and crazy talk ensues), but none the less, gently confront... .you know that hurt when i did not hear from you, is the thanks i get for helping you with the 4K? Does she own it and apologize or do yu get BS?
Finally, again to be contraian, I say CONFRONT further in a caring way... .
has she heard of borderline personality disorder, as a type of disorder that gets played in close intimate relationship where the one who loves the BPD often times gets hurt by their behavior, i.e. emotional reactivity, fear of abandonment so they abandon you first over some trigger you really don't know about?
Is she ready to change that about herself, so you two can learn and grow from this?
Is she willing to go to treatment or have an evaluation... .otherwise, you won't put up with the drama. Clear, concise boundaries. Please note, the chances of getting thru the list in the affirmative i just cited is very slim because of the denial and projection.
But this way you will know... .and go back to the above: What V said.