"Fake best friend"

I am so pissed! I recently found out that one of my best friends doesnt like me. that she has been talking about me behind my bak, & tht shes trying 2 steal my best friend by making petty comments bout me 2 her, & by hanging out w/ her 24/7 so she has no time 2 hang out w/ me. This girl is a leech, a moocher, a clingy little snob. She needs 2 be put in a mental institute. she likes creating drama. i hate it! and all along she was pretending 2 be my friend. i feel hurt, and betrayed. i thought i cld trust her! but no. i wish i cld punch her in the face! i want 2 vent 2 my bff rite now, but noooo. the leech has currently filled up her weekend. shes hanging out w/ my bff rite now! >:( i wonder y im always the one 2 get hurt. y im always the one who ends up friendless. my mother says, treat ppl how u wld want 2 be treated. & i do. & look wat it gets me. hurt, angry, and friendless. she says its karma. it will come back to you. & it will come bak 2 thm. but i keep doing the right thing & i get nothing, while they get the good things. im starting 2 believe that karma is a myth. bcuz if its not, id be somewhere better right now. but if it does, i shld get everything ive ever dreamed of, for all the heartache ive suffered. >:( y is it always me?!?! ugh!!!! >:(