If the friend has explicitly told you multiple times that the friendship is over, it would be best to respect their wishes and not attend the wedding. Attending a wedding would likely be awkward and uncomfortable for both you and the couple, given the soured relationship.
If you still feel compelled to attend, perhaps because you are close to other guests or family members, it's essential to respect the occasion and maintain a respectful distance. Here's what you should consider if you decide to attend:
Dress appropriately: Choose an outfit that is suitable for a wedding. Depending on the wedding's level of formality, you can opt for semi-formal or formal attire. Avoid anything that might attract undue attention or cause discomfort.
Be discreet: If you decide to attend, be discreet and avoid engaging in any confrontations or discussions about the soured relationship. Focus on the event and interact with other guests politely and courteously.
Stay low-key: Keep a low profile and avoid drawing attention to yourself or your relationship with the couple. Be respectful of their special day and allow them to celebrate without any unnecessary drama.
Avoid taking photos: Refrain from taking photos with the couple or posting about the event on social media. It's best not to make the situation more complicated than it already is.
Know when to leave: If you sense any discomfort or tension, it might be best to gracefully excuse yourself and leave the wedding early.
It's essential to remember that attending a wedding where the friendship has soured is not an ideal situation. It's often better to respect the other person's wishes and focus on moving forward separately. If you value the relationship, it might be worth having an honest conversation with your friend at a more appropriate time and trying to mend the friendship. However, the decision to do so should be made with sincerity and respect for their feelings.