Yeah I think this probably tends to be a case, both for bipolar people and those with borderline personality; I have heard the "love/hate" being common with borderline personality disorder. But it is because I think either bipolar or borderline, people of either or both may tend to have really intense feelings and sensitivities toward their environment, and a slight shunning could be perceived as an all-out turn-down or rejection, and likewise, just a slight approval could be perceived as an all-out praise, and in turn the bipolar or borderline person adapts to it, reflecting their environment, so also I think it is a matter of reflecting as well, but the bipolar or borderline reflects it back more intensely, that is why it is probably in turn seen as more of an intense “black/white” kind of thing, and also it is difficult to accept the gray area because the gray area is asking for a “non-intense” or “neutral” response, but people with a more sensitive/intense personality/reaction or whatever are more used to that way of responding, because also, for instance, from traumatic past experiences, their environment/life has also caused their perspective to be stretched far beyond the “normal” person’s perspective. So when that perhaps traumatized person has finally made their way to a more “normal” environment, their own perspective and ways of responding to things, however, might still be with them- the more “black/white” instead of the more “normal gray” ways of viewing things.