Excellent post, RippedTorn.
It may not work as well as you like right away but within a matter of days if you stick with it, you will find yourself thinking about the BPD person less and spending less time thinking about him or her.
This is one of the hardest lessons -- patience and a willingness to try something new, to practise a response different from ruminating and the same old patterns. With time and distance, it becomes so much clearer that the effort put in to shifting your focus and moving on pays off in peace, joy, contentment. But when you're still in the midst of the confusion and pain, it can feel worse to begin detaching. Important to trust yourself and to trust that it's worth the time and effort of focusing on your own life and needs!