I'm willing at some point to get in chat and talk about BPD with you. It sounds like BPD to me but I'm not an expert.

I will say this: BPD and bipolar are very similar but with two main differences. With BPD, your moods change much, much faster. You can literally go through several extreme moods in a matter of minutes, while with bipolar, they last much longer....days, sometimes weeks. Also, with BPD, there is always an underlying reason for the mood change. It can be something subtle that you don't pick up on instantly: a song on the radio, the look someone gives you, or something someone says. With bipolar, there is no overt reason for the change though the emotions can be influenced so some degree by things happening around you. Therefore, meds generally work for bipolar though it sometimes takes a bit to come up with the right ones, while they don't have the same effect with BPD. Some BPD's DO take meds to take off the edge, but meds will not ultimately "cure" it. The only way to truly affect BPD is by changing and reprogramming your mind to think differently. BPD's never learned how to regulate their emotions. For many of us, we were told when young that our emotions didn't mean anything or that we didn't have the right to feel what we feel, so we never learned how to control them....

Also, quite a few are diagnosed with both.....