Hey. I'm... Sorry to hear about your dx.
:-(
I think this dx is indeed one of the hardest ones to grasp... Some theorists bemoan the fact that BPD has become something of a dumping ground dx and it is indeed hard to make sense of what the dx is supposed to be about. I think that repressed anger / anger turned inwards is an issue that a lot of people struggle with. I know I most certainly do.

> Having trouble finding the good things about being borderline.

Well... Sometimes the dx helps one get access to forms of treatment that one can't access without the dx. DBT for example. If you ever get the chance to do that then I'd highly reccomend it. I think it could really help people with most dx but it is only empirically validated (as a package) for BPD dx.

People with a dx of BPD are the (in the words of Linehan) 'colourful' people of this world. We aren't boring and, well, you wouldn't want to be - would you? Emotional intensity can be channeled into passion and can help one succeed at what one wants to do. It can be useful with respect to persuading others to affect change in the name of a good cause (animal welfare or global warming, for example). People with BPD also tend to be emotionally sensitive and can pick up on the moods and emotions of others. When well channeled this can lead to an almost uncanny ability to 'mindread' the emotional state of others.