Miles is left wondering whether he has ruined their friendship by revealing his feelings to her.

I've ruined my friendship with the Hermeses, and because of me she had to go back to the Library.

Serena had a different approach, but that's not going to ruin our friendship.

However she feared that if she acted on her feelings, it might ruin their friendship.

However, as they do not wish to ruin their friendship, they establish a set of ground rules.

Pansy knew that the truth might well have ruined their friendship.

Christian refused, saying that he did not want to ruin their friendship.

I won't let you stab me and ruin our friendship.