Is it wrong to hate her?

My friend Leslie has this other friend named caitlin. Well caitlin thinks that she's too cool foreveryone! She's this tall ass fat chick whose dady buys her anything she wants. She's supposed to be in school but she never goes because she's lazy! My boyfriend is leslie's brother. Anytime my boyfriend and I are in his room watching tv or just bonding or whatever, Caitlin barges in! She always has to go in Brent's room even when im not there! Brent calls her names and tells her to go away and she doesn't listen. Well leslie told me that she asks about Brent a bunch and leslie has told her to back off because h's with me. Well I told her that i think she should stop BARGING in his room so much because it gets aggravating after a while.( i never said anything other than that) She took it all out of proportion and said that i think she's flirting with him and saying that she'll never go to that house! She talks abuot me behind my back all the freakin time! Is it wrong to just hate her?