filthy, lying ass <_<, i need advice... Options

[Chii]

i am so incredibly pissed right now, oh my dear lord

so my brother tells me that my guy friend is telling everyone that i'm his girl. that is ridiculous! i do not like him that way at all and right now, i don't think i even like him as a friend or a human being anymore.

so then he signs on and this happens:

me (12:08:58 AM): hey!!
ass (12:09:04 AM): hey1!
me (12:09:08 AM): are you telling people that i'm going out with you??
ass(12:09:15 AM): no why?
me (12:09:27 AM): because my brother told me that you are
ass(12:09:38 AM): huh?
ass(12:09:45 AM): neva even seen him
me (12:09:59 AM): he told me that people are telling him that you claim that we are going out
ass (12:10:10 AM): huh????
ass is away at 12:11:12 AM.
ass returned at 12:11:14 AM.
ass (12:11:17 AM): brb

he can't even deny it! what an ass! there isn't any school next week and he's leaving tomorrow anyway for vacation. how can i confront him and what should i say??

[Chii]

Well, he said "no, why?"--isn't that denying it? Are you absolutely positive what your brother heard was the truth?

sure he said no but then he goes "huh? huh???" then disappears so that's not really a valid denial. he didn't even defend himself either. i know of at least one mutual friend they have. i don't know his friends and my brother has friends all over the place. plus, my brother would have no reason to lie to me.

If I were you, I honestly wouldn't care much. Depending on how fast the word spreads. No one has actually seen you two together so how can you guys be going out? Anyways, just be patient until he returns.

word spreads fast, especially if it's about me. with my last boyfriend, people i didn't know and haven't even seen before would look at me and say to each other, that's ______'s girlfriend. but anyway, people have seen us together. that's why people have informed my brother. my brother's friends have also said that the guy says that i'm his girl.