Do I miss a friendship, or do I miss my past?

Hi, new here! I could use some friendship advice. When I was in kindergarten, I met this girl, and we were inseparable for about 5 years- family vacations, sleepovers, the whole nine). She had to go to a different school for a few years and so we distanced. Weve graduated now, and have talked a few times since but never as closely as we used to. Recently, Ive been really missing her presence in my life, and reached out- first over Facebook in December, and over text a few weeks ago. Neither received a response. Normally, Im a very brush it off type of person, but Im finding myself really hurt by this and having a hard time letting it/her go, even though the logical part of me knows, maybe she has moved on, or doesnt want to talk for whatever reason. The thing is, I experienced some big life changes in the past few years (my mother passed away) and Im finding myself wondering, do I only yearn for her friendship because it is a tie to my life before all that happened? I would love any advice on how to either salvage this relationship or (more likely) find peace that I may never have it again.