As a recovering alcoholic with BPII, I feel much of your pain. I can't help you with the friends thing, as almost all of my friends I've known since high school or are from forced situations (the military), the one time I was truly alone was college, where i struggled to make connections with people too and moved back after a year. The people around here are super supportive and many also understand what your going through. Are you doing AA or anything? If you find the 12-steps to be as balls as I did, check out SMART Recovery. Even if you do AA they can work together. Can't have too many tools in the sobriety toolbox. It's secular and science based. If you are near a major metropolitan area they likely have face to face meetings, and if not they have daily online meetings. I'm taking training next month to start group around where I live. Pm any questions you have.

Stay strong, listen to the good people here, listen your doc(s) and never give up!