Nothing in common..

I’m 19 and my fiance is 20. We’ve been engaged for 1 year and together 3 (on January 13th) we have a baby boy that’s 11 months. Today we got into a small argument because I’m constantly feeling bored ... and he asked me if we have anything in common anymore because we used to .. we live on our own and I don’t know if feeling this way it’s “normal” just here for advice/opinions. Thank you in advance ❤️