Welcome, childofthemoon8

Well, whatever it is, it doesn't sound like much fun. We obviously can't diagnose, but you do describe a lot of borderline behavior and reactions. Indicators of bipolar seem to be fewer, but present. Sometimes that just boils down to what one happens to write about (being but one of many reasons we can't diagnose -- lack of full and objective IRL picture -- which is an inescapeable reality for everyone).

Long/short -- it could be both. But not to worry. The important thing is that the symptoms are treated, more than what label it has (not saying label is without merit, because I believe it is, but to point out the importance of remembering the larger picture).

If there is BPD (borderline), there is some good news for you, and that is that it is curable. With a lot of hard work and therapy (like DBT), because it basically arises from skewed perceptions producing maladaptive behaviors. They likely were useful (probably felt protective) at some point in time, but they no longer serve you well. In fact, make problems for you. But because they were learned (even if subconciously), they can be unlearned. Takes dedication, but very worthwhile in making one's life less tumultuous (especially in regards to relationships of all kinds).