I would say "yes", without a doubt. The fact that you don't have any relationships is a small sign of BPD. A lot of us have very few interpersonal relationships because we can't deal with them when they DO come about. We find that we function better without the relationships and CHOOSE to stay away from them. The sure sign of your BPD is when something happens that prompts you to become friends with someone...how you will react at that time. Just because you are not in any relationships or have any friends now doesn't mean that you won't eventually find someone you want to associate with. How you react to that situation will be the determining factor.