Shit, that was terrifying to read. I went to see a psychiatrist a few days ago and he prescribed medication for anxiety, an anti-depressant called Cymbalta, and booked me in for cognitive behavioural therapy. I'll bring up borderline personality disorder when I see him next, because most of the symptoms listed there are scarily on point for my mind set and behaviour:

• Extreme reactions—including panic, depression, rage, or frantic actions to abandonment, whether real or perceived
• Distorted and unstable self-image or sense of self, which can result in sudden changes in feelings, opinions, values, or plans and goals for the future (such as school or career choices)
• Impulsive and often dangerous behaviors, such as spending sprees, unsafe sex, substance abuse, reckless driving, and binge eating
• Recurring suicidal behaviors or threats or self-harming behavior, such as cutting
• Intense and highly changeable moods, with each episode lasting from a few hours to a few days
• Chronic feelings of emptiness and/or boredom**
• Inappropriate, intense anger or problems controlling anger
• Having stress-related paranoid thoughts or severe dissociative symptoms, such as feeling cut off from oneself, observing oneself from outside the body, or losing touch with reality.

^ There are more listed in the DSM link you shared with me, but those are the ones I have.

• I always react disproportionately to the situation, especially abandonment.
• My self image yo-yos between 'smartest, best looking guy in the world' and 'waste of oxygen'. I work out all the time and study all I can to justify the former for as long as possible. I've changed university degrees 4 times and started apprenticeships and career paths that I never went through with.
• I drink drive way too often, use way too many drugs, and blow money I don't have on shit I don't need.
• I have suicidal thoughts every couple of weeks. I don't cut and I'd never go through with killing myself.
• I get intense moods that just won't go away. When those moods happen to be anger and anxiety, life is pretty unbearable.
• I am always bored and unfulfilled. I was originally diagnosed with ADD.
• Well, we've seen how I inappropriately react to anger. I go from 0-100 in an instant.
• Depersonalisation.. I feel like I'm watching myself from inside myself, but not a part of myself.. If that makes any sense.

I'm highly functioning otherwise. I work hard and am being promoted to a leadership role, and I have good personal relationships for the most part- my sister and I have always fought.

Like you said, we can't diagnose me over the internet, but I'll bring this stuff up with my psychiatrist. Thank you for caring enough to post this.