Girl teases me heavily, what does it mean?

She really seems to enjoy it also, I don't think I've ever seen anybody so enthusiastic while being "mean" to somebody. We play around a lot and we play off each other but most of the time, she starts the crap. No matter what I do or say, she always has something to say and calls me out on it. Things like "oh, I forgot you were perfect" and "you are so conceited" pop out of her mouth often. what's up with he? She is 23 and acts like she is 8 when she is with me (I guess we both act like kids lol)
Girl teases me heavily, what does it mean?
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