This situation has me confused, though it isn't(I think) of the romantic nature.

I have a friend at my school, but we are barely friends. Think maybe a little conversation about nothing important, or little side comments. Well, I somehow offended by accident(Or was it purposely, I can't even remember) by being picked by the teacher for something she wanted to do instead. She decided not to talk to me for the rest of the year. She seemed pretty serious about it, because everytime she forgets and says something to me, she goes "Oh yea, I'm not talking to you". I'm just confused as to how I am to react. Its not like talking to her is something I need to do, but it is wierd to have that happen.