I accepted that taking meds, though I was scared to, is something I need to do. Not only because I am borderline, but because with the bipolar AND the borderline, it's clearly a case of necessity for me.
I too think you could look at it as taking the meds not because of borderline, but because of dysthymic disorder/anxiety.....and you know what, it's OK to take meds because of those, anyway! Maybe you will discover that there are feelings of a happier balance that you haven't had.....
And anyway, with the talk of there being a biochemical component to borderline, maybe meds WOULD help the borderline itself, too.....you never know. You never know if you'd don't try. And you may not have much for side effects anyway, you don't know that until you try, too!
I haven't taken my meds long enough to tell you that I definitely feel happier.....I don't feel happier, but I think I am not having as intense an imbalance emotionally as I was. My emotions ARE still intense, but the depression is not as crushing and the anxiety not as jittery and the mania not as soaring.....
I know it's a hard, scary decision to come to terms with, though.