what do i do ?

Basically there is a new teacher in my school French class who Is training but teaches us for a while. She makes us sit in a boy,girl seating arrangement but I have to sit with a boy who h as a friend who keeps making of me due to the fact that I have to sit wit him . I have to sit with the boy in class and another boy makes fun of me and laughs at me all the time. I cant tell the teacher because I know the boy and he's not scares of the teacher at all and will tell everyone that I snitched off him. Ik he's bot scared of the teacher because he makes fun of her in front of her face . Idk what to do . Now Tha teacher makes us work with the person we are sat with so again I have to work with the boy and AGAIN I get made fun of and its embarrassing and everybody laughs what do I do. They keeps laughing and making fun of me because I have to sit with a boy and WORK with him what do I do