If the feeling is bothering you a lot, you need to dig. Try to find out what it is you're hoping for from that other life, that's apparently missing in your current one. If it isn't that bad, it's really, really common and you can honestly try to just distract yourself so you don't repeatedly compare your life to a literal, and rather vague, fantasy. That's not getting you anywhere.

I think a core thing is that people need a certain level of variety, some more than others, and still it's really easy to get caught in a groove. Society is not built for that kind of enrichment.

Do you have a hobby or something?