Feeling homesick and longing for childhood

I’m in a different country all by myself (I have friends). I long for the childhood family routine that I once had, but is fading away as my sister moves on with her soon-to-be married life, and with my Dad, all under one roof, as if we were kids.

I know growing up is all about making your own life, your own family, and creating your own routines.

I know some people long for their own independence. And people can keep in touch over FaceTime. But how do I escape the sadness and longing for that childhood family routine, and being able to see family once a week?