Is the fact that my crush keeps teasing me a sign that she might like me too?

There is this girl in my class i really like. We have similar interets and just get along easily. I guess you can say we became good friends over the time but i could never tell if she likes me the same way i like her. A couple of weeks ago she was at my place just to do homework together. On this day she found out that i still wear briefs and started making jokes about it by calling them tighty whities. After that she started teasing me regulary by pantising me or even giving me wedgies at school. Does she try to be mean or could she really like me?
Is the fact that my crush keeps teasing me a sign that she might like me too?
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