be good friends
be (just) good friends
A phrase used to emphasize that two people are not in a romantic relationship. Oh, he's not my boyfriend—we're just good friends.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
be (just) good ˈfriendsused to say that two friends are not having a romantic relationship with each other: People often think Ian and I are a couple, but we’re just good friends.
Farlex Partner Idioms Dictionary © Farlex 2017