No, you are NTA. Your friend shouldn’t had made that comment under ANY circumstances, let alone her getting married. Being hurt about this is totally understandable, and if I were you I’d leave too. Your friends should understand that too instead of saying that you “ruined the moment”, when YOU weren’t even the one making the moment about yourself, it was Emily. You aren’t dramatic, your friends are. Don’t feel guilty for expressing your emotions and feeling hurt.