Welcome

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I'm sorry to hear that things are so up and down in your relationship. You've found a great place for support and help. The awesome thing about roller coasters is that you can get off the ride when you choose to do so. Are you ready to get off the ride?
It takes a lot of work on your part and a lot of not focusing so much on your partner and focusing more on you.
We have a saying around here: Before you can make things better, you have t
stop making it worse . Us nons have created negative patterns of responding to our pwBPD. When we can remove those negative responses (such as walking on egg shells, codependency, JADEing, etc.) then we can start to gain some equilibrium in ourselves and our pwBPD doesn't throw us off as easily.
What would you say is the biggest issue you have difficulty with right now?