husband misses his past

But...my husband is a big "reminiscer" on the past. Tonight he told me he felt really emotional because he missed living with his dad and spending time with him. He seems to talk about how he wishes he could go back to his high school days or his college days often. It's not that he says he wishes we didn't meet...he just misses the old days sometimes. I understand to a point, but I personally am so happy with where our life is now I could care less about most of my past. I do get a little hurt when he says that stuff only because it makes me feel like he isn't completely content in everything we have now. Does anyone else's husband or partner ever say those things? Or do you personally reminisce about your past often? I'm just not sure if it's normal or if it's something I need to be concerned about. Advice please!🙏🏻