for all of the people confused, she's saying she hates him because he works so hard for her, and doesn't focus on himself. She also says she might not be able to continue drawing for reasons such as it might be too expensive, or she needs to focus on school. You can see this in the earlier chapters where her parents talk about this and he overhears.
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not the coach learning chinese so fast and me still not being able to keep up with my duolingo

when he said im not a girl.....bro it was like he was reminding both of them that they are the same gender, and they think they cant fall in love

AHHH MY HEARTEU