some of y’all don’t actually miss your exes ex boos ex crushes or whatever- you just have no new options available and/or don’t have energy to invest in a new relationship where you’ll have to open up all over again so you start idealizing an old bond
and here u go finding things that weren’t there to begin with, looking into stuff you didn’t even appreciate that much before but suddenly those newfound qualities have u reminiscing and thinking Maybe if you adjust x y z u can get ur fix again w someone u alr know, less effort.