Feeling upset about your narcissist ex getting married to the girl he left you for is entirely understandable, even if you logically know who he is. Emotional responses can be complex and are not always entirely rational. Here are a few reasons why you might be feeling this way:
Emotional attachment: Regardless of his narcissistic tendencies, you may have still developed genuine emotional attachment and feelings for him during your relationship. Ending a relationship, especially if you didn't initiate it, can leave emotional scars and a sense of loss.
Comparison and self-worth: Seeing your ex move on and get married can trigger feelings of comparison and self-doubt. You might start questioning your own worth and desirability, especially if you are not in a new relationship or have had difficulties finding a new partner.
Feeling replaced: It's natural to feel a sense of hurt and betrayal when someone you once cared for seemingly moves on quickly and replaces you with someone else. This can evoke feelings of rejection and inadequacy.
Unresolved emotions: Sometimes, even after a relationship ends, there can be unresolved emotions and unresolved issues that continue to affect you. This can amplify the feelings of sadness and upset.
Fear of missing out: Hearing about his upcoming wedding might bring up a fear of missing out on the happiness and experiences he is now sharing with someone else.
Sense of injustice: Narcissistic individuals can be manipulative and hurtful, leaving behind emotional turmoil. Feeling upset about his wedding might evoke a sense of injustice, especially if you feel that he treated you poorly during the relationship.
Triggers from past experiences: Past experiences with relationships, especially if you've encountered narcissists or emotionally abusive partners before, might make this situation more painful for you.
Remember that emotions are valid and part of being human. It's essential to give yourself time and space to process these feelings. Seeking support from friends, family, or a therapist can be beneficial in understanding and managing these emotions. Focus on self-care, personal growth, and creating a fulfilling life for yourself, and with time, the pain should gradually lessen.