I cannot stop investigating my girlfriend. She's never (okay, *rarely*) been anything BUT supportive and patient and honest with me, but I have this recurring urge to deep dive her life in an effort to find discrepancies or ammunition or something to incriminate her into a "gotcha moment."

I honestly don't know why I do it.

Every time the investigative urge creeps up, I succumb to it. I honestly don't know why I do it. All I know is that I go down this rabbit hole and I fixate on irrelevant details that lead to a blow up argument, and that our relationship is imploding because of it. Because of me.

Is this a common thing for pwBPD to do with their FP? Why do I do this and how do I stop?