Why do I hate seeing my ex with someone else?

Youre Worried Your Past Relationship Didnt Mean Anything To Them. If someone meant a lot to you, its only natural to want them to feel the same way about you. Seeing your ex with someone else may trigger doubts and insecurities over how your partner truly felt about you in the relationship.

Why do I keep thinking of my ex while in a relationship?

Thinking about an ex is normal, and it doesnt mean you need to break up with the person youre dating. “It is natural for an emotion to bring up other experiences with similar emotions, she said. The feelings might match, and in fact, we might realize that our first relationship led to this relationship.