Hi Sparkledust and welcome to the family

I'm so sorry to hear what you are going through right now but I am glad you found us! This board offers a lot of information on BPD and tools that can help us cope with difficult situations. Since your husband is undiagnosed I would advise you to take a look around and see if the behaviors described in the information and by other members resonate with you. Getting a better understanding of what's going on with our loved ones and connecting with other members helped me a lot to feel empowered and less alone.
I hope you don't mind me asking some question to get a better impression of your situation and how we can help you.
Is this the first time that your husband expressed his need to move on?
What other behaviors led you to think he has BPD?