Sometimes when I think too hard about my relationships and my life I feel like I am the only person in the entire world who cares about me. And then I feel it all the way down to the pit of my stomach and I can't focus on anything else besides how lonely I am and the people that I wish I were talking to. It hurts so much and sometimes I feel like I can't breathe because it overwhelms me so much and makes me so sad.
 
As a person who has only recently discovered I have BPD, is this something that goes along with that or is it something else? 

TL;DR - Is crippling loneliness a part of BPD?