My deskmate asked me to help Wei Zi in class.

In the same class, if she only asks you to work when you are at the back desk and ignores you when you change places, it is just asking you to work. If you really like it, you can try it at least once. It is her business to agree or disagree, and it is your business to like her. You should at least let her know that it will be uncomfortable to hold it in your heart. It will be much happier to say it.