Does constant teasing and sarcastic attitude from a girl mean anything?

I'm kinda curious. I kinda like this girl because of her personality. She is smart, funny and can keep up with me in the verbal sparring. One thing I have noticed is that she never stops being sarcastic towards me or teasing me. Like today we were in the cafeteria and I dropped my pen and I said "sorry, I didn't mean to disturb you" in a jokey kind of way and she said "that doesn't doesn't disturb me, its when you start speaking that bothers me" and stuff like that, she seems serious when she says it but if she really foundme that irritating she wouldn't work with me all the time and being partners in projects, at least that's what I think. Is there a reason why she is like that? I seriously haven't seen her give this treatment to others, she is usually very friendly.
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Hahaha, OK, I'm not going to complain, I admit I like it when she is like that because it keeps the conversation fun and we both kinda poke fun at each other but, is there a possibility she will ever stop doing it and just be her "regular" self? or is this her normal self? like I said, I don't really see her acting like this with other people, so its very confusing. If I ask she tells me to stop crying :/ lol
Does constant teasing and sarcastic attitude from a girl mean anything?
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