I am also diagnosed with Borderline Personality Disorder and have extreme fears of abandonment and being alone. I have lived like this my whole life and now my Therapist is treating me to find activities, small ones to do by myself. She says we are born alone, we live alone and we die alone. She says we are alone and we have to learn to be comfortable in our own bubble. I do believe that comes with self respect, self esteem and confidence. I am working every week to be ok with "me" and find who "Me" is really is. Not sure if that helped at all, but that's just a little bit of what I am going through.