I went to community college for my first two years and only had adult friends. It was exactly what I needed at the time because they shared their life experience with me and it was immensely helpful in making my own good decisions. Now in my 40s my husband and I are the older friends in our game group who do the same for our 20-something friends. We even convinced one of them to get his GED and had a big celebration for him once he got it when his own family blew him off over it. You have to make your own community where you can and older people outside of family have value too.
Ugh this just triggered memories of that scene from What Remains of Edith Finch (IYKYK).