At first I experienced lots of denial, but that never helps.
Despite the difficulty of BPD, and the stigma that comes with it, acceptance is key. This way, you can move towards recovery. It's totally your decision if you want to tell your family/friends. Personally, I did. But we all come from different situations. Your work does not need to know.
Key things towards recovery? I'd say one-on-one therapy is probably #1, followed by other methods such as medication or perhaps group sessions like the ones held here at PC.

You are not alone with how you feel. It is a daily struggle to have BPD, but you can learn to deal with some of the major issues in your illness and then you can live with this illness.