Understatement of the year. Come on bro. 8 pages of advice and support just so you can end up in the place you started? Your dependency is going to keep causing you a world of hurt until you spend enough time away from the drug of this girl's validation you've become addicted to. That, and you persist in expecting that logic is going to explain and resolve any of this madness. Logic doesn't apply to BPD. It's a parallel universe.
Please get yourself some support people around you and some pro help asap.
I do have a much better understanding thanks to this thread, I guess the message is ... I'll never understand ? They're not logical creatures and she could say something to me one day and feel the exact opposite or block me out forever the next. This advice wasn't wasted on me and it's been incredibly therapeutic for me to log my thoughts on here so for that as well I am grateful. I will get help