Long version: If any friend demonstrated - proved - to me that his/her word, promise, commitment (let alone vow) was meaningless - worthless - that would be proof-positive that he/she ended our friendship at that point.
"Friendy"? Yes "Civil" (even tho I hate that word)? Yes. Friend? Afraid not. Too late.
Gardener
"My soul, be satisfied with flowers, With fruit, with weeds even; but gather them In the one garden you may call your own." Cyrano deBergerac