Is it normal to think about an ex while in a new relationship?
Mostly.Normal for most people
Yes, it’s normal for an ex to cross your mind while you’re in a new relationship. A passing thought doesn’t mean you want your ex back or care any less about your current partner.
Past relationships leave memories, and your brain may bring them up when something reminds you of your ex—or when you’re comparing how things feel now. Lots of people think about former partners now and then, even when they’re happy with someone new.
What matters more is how you feel and what you do with the thought. If you’re constantly longing for your ex or it’s getting in the way of being present with your partner, it may be worth taking a closer look at what you want. But an occasional thought is just a thought, not a betrayal.