I have a deskmate for half a year, who is a very unpleasant girl. She complains about this and that every day, for example, the food at school is worse than at home. ...

So is vanity.

I like talking about myself, as if I shouldn't live this life.

But I'm already in this life.

I suggest that every time she complains like this,

You just have to face her bravely

Say it a few times and she won't complain to you again.

For example, if she says the water is cold, you can say, "Go and get hot water when the water is cold."

When the food is worse than at home, you say, "I can't help it. That's what schools are like. You can bring it from home yourself. "