Thank you, ahoy.

She is still calling and it is killing me. She has been calling almost non-stop for 12 hours now.
I gave up everything for her, I put so much into the relationship. I was dependent on her, and she was dependent on me. It was unhealthy but it seemed to work for us. We both spent very minimal time with other people, and almost all the time together (she even got me a job with her because we were so attached).
The problem is that I am a very shy person, I drifted away from my friends in favor of my girlfriend. She was the only girlfriend I've ever had and, to be honest, it was a fluke that we got together in the first place. I'm so scared I won't be able to find anyone else.
Now all I have is my family, I feel so alone.
Once again, right there with you, my longest relationship prior to my wife was 8 months. Unfortunately a lot of her issues I passed off as things you deal with being in a serious relationship. I ended two friendships on her request and distanced myself from my friends/family over the years too, the feeling of isolation is terrible, maybe use this time to reconnect with those you distanced yourself from.
I felt very much that I wouldn't find anyone else. Guess what, I'm almost 4 months out, way too early to date, but I can see that I DESERVE someone who will remain faithful and treat me well and some days, I'm so excited for the future because I know I'm fundamentally a good person and a good catch! I think most of us on here are generous, giving people (most likely including you!) it's part of what kept us enmeshed with our BPD's for so long!
When the time is right (you will know when that is) you can begin to look at what may have attracted you to someone with BPD traits in the first instance, then kept you enmeshed! It's scary stuff, but it's important because healing from this will make us MUCH more attractive to potential healthy partners in the future.
One last thing, you are probably start playing the 'what ifs' game a lot. Please remember to cut yourself some slack ok, I was so hard on myself at the time of separation that in hindsight, were really out of my control or was simply cause/effect from her erratic behavior. If you truly think you made mistakes STILL CUT YOURSELF SOME SLACK. Process what you did/didn't do later on, you have enough weight on your shoulders as it is.