Hi Bobbi!
Let me welcome you here to the bpdfamily, and wish for you as much help and support as I have received. It's clear you have a lot in common with many of us here, and this is a community where we help each other, so I'm sure if you keep posting and reading you will find it helpful.
The feeling of loneliness that can come with a relationship with a disordered person is natural. The non-disordered person spends so much of his/her life dealing with the disordered person that we neglect ourselves, our wants and needs, our family and friends, and even our own emotions.
I know that life is hard right now, but there is a silver-lining to all of this. Now that you are starting to understand what is happening, you can start to make changes within yourself. When you make changes, it forces the dynamics of the relationship to change. There are some great tools to help you on this journey in the sidebar to the right. Given what you have written, I am tempted to suggest that you start with the lesson, the first one being:
Surviving confrontation and disrespect. It will help you break the cycle of conflict and take your power back.
What happened recently that brought you here, and how can we best support you?
I look forward to reading more of your posts.