Poetical,

I am so glad you have found us... .I'm also sorry you have been having such a tough time in your r/s. (relationship)
I'm glad because bpdfamily helped me out a great deal. I think we can help you out a bunch as well.
https://bpdfamily.com/message_board/index.php?topic=56206Look to the right of the screen... .click on the lessons. Lots of information there. You can click on link above if you are having hard time.
Please come back and post some questions about what you have read. That will be the start of the process of learning about the disorder that it is likely that you face.
You can do this!
Long term... .I'm thinking that a period of intensive learning before trying to dive back into the r/s is a good plan.
I don't think you are being over optimistic by picking staying... .if that is your goal... be proud of it. Work for it... .!