So a decent buddy of mine got between my ex gf (basically just a FWB) & I. All of a sudden, after months of a decent & non committed relationship, this white knight comes riding in to save the day. He gave her the inside scoop on what I'm doing & who else I am hanging out with. Neither the white night(claims to be a friend) nor my ex know that I know he did this. Do I call him out on this, or do I hold frame & not give this beta bitch the time of day??