Girl, if a guy hurts you (emotionally) how do you act?

I said some hurtful things to this girl out of anger (we know to to push each other buttons). I felt bad after that and tried to apologize but she kept telling me she didn't care if I apologized or not and that she wasn't mad, etc. After a bit of talking I asked her "so, are you gonna accept my apology, even if you don't care and aren't mad? because I do feel bad" and she just told me "why should I? you are just gonna do it again" so is she or isn't she mad then? Is she just trying to act like she isn't hurt?. I feel really bad, should I keep trying? (we are not dating)
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I screwed up. I mean, I know how to make her laugh but she wouldn't have it. I tried talking to her (I didn't see her for a few days) and find out how is she been and how her family is and she just gave me one word answers. At first she just said "i don't care" or when I told her I would never do it again she said "your word means nothing to me, I don't believe you" so for those kind of answers, I know she is hurt and does care. I feel awful.
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Thanks, you have given me great input and I really am sorry for being so stupid. So you think she is that upset because she does care about what I say? Or would you get that mad with any random guy? I know I don't go around apologizing like that to just anybody, I have to really care about them, she is the world to me.
Girl, if a guy hurts you (emotionally) how do you act?
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