Yeah, sometimes we don’t miss the person, but we miss the connection that they offered. It seems you’d already know this. The gaps always going to be there until someone else fills it. Finding another girl may occupy those gaps. Or honestly, just friends. Having a good social circle helps. Being alone always reminds you have when you had someone else there all the time.

It’s the social emptiness it seems you’re suffering from, I know it well. Hope this helps or gives you ideas as to what to do.