I don't really know the ins and outs of Facebook, and anyways, i'm sure my advice will come in handy when your present girlfriend eventually files for a restraining order against you
If you engaged in more awkward silences with her then she wouldn't feel the knead to take out a (retraining... refraining... retrostraining... whatever) order against you. Have you considered taking her out on a space walk? You really oughta find something that floats her and her boat.