only you can answer that question for yourself, but if you have put it to a binary decision of "1) convince your wife she has BPD and is the source of marital strife or 2) leave", then you're probably better off leaving (***note - i'm not recommending you leave, i'm just saying that you shouldnt count on being able to convince your wife she has BPD, and that that alone will solve your problems**

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if you want to keep the marriage going, you will need to work on yourself and how to handle your own feelings surrounding your wife and her instability.
you can only change yourself.