i may as well be describing a former friend of mine to you, but here we go.

-easily angered. you're often afraid that you'll say something wrong and they'll get mad.

-dependent. they make you feel like you're responsible for their happiness.

-jealous. makes comparisons with themselves and your other friends.

-narcissism. thinks you should care about their achievements more than your own and rejects criticism.

here's the best part. all of these can be seen in the one phrase "i guess you don't care about me", or "do you even care about me?", "you hate me", etc. By the time i began separating myself from this certain friend she said something like that every time we talked. bad, bad, VERY BAD.