Haven't felt the same since I left. Anyone else experience this?

It has almost been a year since I moved out. While I'm glad I am out of the toxic situation I miss what I had, the good times at least. I'm not exactly sure what makes me feel this way, it could be that I miss being around my siblings all the time, or miss having regular social interaction, or maybe even missing the place itself if that makes sense. It makes me sad, and it is so confusing. I'm glad I'm out, but also am missing something, I'm not sure what. Has anyone else felt this way? It would be helpful to know I'm not alone in these feelings.