could someone help me out a bit I'm not quite sure what to say on the friends part so if someone can give me an example in Spanish it'd be very much appreciated

In the letter you have to talk about two of your other friends.
Example: we are gonna pretend that your friends are Pedro and Maria, so, you have to talk about them with the Spanish exchange student.

“Pedro y Maria, son dos de mis mejores amigos, son ese tipo de personas con las que puedes reír hasta que te duela el estómago”

Basically something like that.