I had this relationship with a woman, a colleague, and it was/is EXTREMELY rocky. One of my closest friend (Who isn't aware of my problems with her) said that if there's one thing he knows about me, it's that I "can't stand being alone." My former boss (The same boss for the woman I was in the relationship with) who studied some field in psychology said something about me and mental illness (I wasn't paying attention to her) and how I was easy to read after only knowing me for a month. 

So, then I started reading about BPD (Currently waiting for my appointment with a professional) and in all the articles I read, they always say something about how people with BPD "can't stand being alone."

So now I want to know what exactly that means. Does it mean they can't function/work properly without being aided by someone? Or does it mean they yearn for companionship, a loving relationship?