"I DONT GET MAD AT ANYONE ELSE BUT ME."

Bingo.

Maybe this will help a little more. The "quiet borderline" acts inward---as opposed to acting out.

Acting In, Acting Out

Most borderline behavior is about one thing: trying to cope with internal anguish. However, people with BPD may do this in different ways. In our experience, the behavior of people with BPD tends to fall into two general categories: "acting out" and "acting in." These are not official, empirically researched categories. Rather, they are a convenient, real-world way of looking at differences.

Acting-out behaviors are attempts to alleviate pain by dumping it onto someone else-for example, by raging, blaming, criticizing, making accusations, becoming physically violent, and engaging in verbal abuse. Acting-out behaviors cause direct anguish for friends, family members, and partners. For example, one borderline woman, Kiesha, became very angry when she felt that her husband was ignoring her at an office Christmas party. So she went up to him, threw her drink in his face, and stalked out.

Acting-in behaviors mostly hurt the person with BPD, although non-BPs are also affected. Someone with BPD who mostly acts in may feel extremely guilty over imagined transgressions. They may mutilate themselves, try to hold in their anger, and blame themselves for problems that are not their fault. Suicide is also a possibility.

You can read more here...

http://www.bpdcentral.com/resources/basics/types.shtml