About the reason for changing seats?

First, tell the teacher that you are sitting behind that girl, and your grades have been declining. Then show your attitude, that is, how much you want to study hard. Then put forward your opinion, be sure to tell the teacher, just simply want to improve your grades. You can say you don't have to change seats, but I hope the teacher will talk to that girl without affecting your grades. If it really doesn't work, let parents communicate with teachers, which is generally better.

If the teacher puts forward any collective interests or personal interests, you can say so, but you can't ignore the collective interests and completely ignore the personal interests.

Finally, I want the teacher to reiterate your request and thank you by the way.

Affectionate hint: Be sure to behave well for a while before telling the teacher ~

I used to worry about changing seats.

Good luck ~ ~

If the teacher in your class still likes you, just tell the teacher to change seats. That's what I did and I changed it the next day. Sometimes it works.