Is it normal to fantasize about an ex while in a relationship?
Yep.Totally normal
Yes, it’s normal to sometimes fantasize about an ex while you’re in a relationship. A fantasy doesn’t automatically mean you want your ex back or care less about your partner.
Your mind can revisit old chemistry, memories, or familiar scenarios without it being a secret relationship vote. Fantasies are thoughts, not plans—and lots of people have them, even when they’re happy with their current partner.
People draw different lines around what feels okay, but you don’t have to treat every private thought like a confession-worthy event. If the fantasies are taking over, making you unhappy, or pointing to something you miss in your current relationship, it may be worth thinking about that part rather than panicking about the ex.