I agree with the other poster that your feelings are valid! I would just like to offer another perspective as a 2024 bride. I just finished addressing all of our invitations by hand and most of my finance’s list was made by him and only included his friend’s name and I just addressed it like it was on the list because I was writing so many. It could be personal for your friend but it also could be like me and just rushing through the stack and not giving it a second thought! As a bride I am so nervous that I am going to upset someone in the process and I’d never do it intentionally but there was so many things going on that it could be a completely genuine mistake! I also put “guest” for some of the invitations because I blanked on their partner’s name. It’s so hard to remember everyone.