Hi Scooby,
Welcome to the Group
I felt that same feeling of relief when I discovered BPD in relation to my partner's ex-wife. There is a name, I can learn more about it, I can learn new ways to approach the issues etc. Stop Walking on EggShells is an excellent book to read and get a grounding in what BPD is.
What would you say are the issues you are struggling with most? There is a lot of wisdom, support, ideas and tools to be found here.
I hope you will share more of your own story when you are ready, we are all about helping each other around here.
Take Care,
Panda39