Dealing with BPD wife's FP obsessions

How do other Redditors deal with their significant others FP obsessions? My wife's tends to gravitate towards toxic people or manipulative people as her FP. She has always recognized it and moved on at some point. It's hard because it puts a massive strain on our relationship. She is the absolute love of my life, I only want to be with her, I know her traumatic past, I try to be as supportive as possible with her BPD. But it hurts so much when I notice that she has focused on a FP.