A girl at kickboxing hates me for no reason?

She always gives me dirty looks, says that I’m trying to steal her boyfriend (I’m not even remotely interested in him and I have a boyfriend of my own! Duh!), and asks people whether I’ve said anything bad about her when I don’t talk about her to others! I hate drama and I don’t get why she has to start drama with me. by the way, she’s a bit younger than me, maybe she’s immature? I dunno.
A girl at kickboxing hates me for no reason?
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