one of my friends wanted me to leave out my other good friend and not tell her about our beach trip we were planning. i told her that i would not go unless we could all go together because i just do not leave people out.
why would your friend want to exclude your other friend? definitely not cool.
i am fiercely loyal to my friends and do not think anyone should be excluded, especially among a group of friends that are all going but one person. not cool.