Whenever I start feeling this way, I ask myself: "What would we talk about?" When we were together, we rarely talked, just sat there and drank. That used to work. When I got sober, it didn't work any more.
I understand your fear of having someone to go to in an emergency. I currently have NO ONE either. In fact, I often hope that if something happens to me, it happens on a workday, where at least people at work would miss me.
This is a time to remember that our Higher Power, whom I call God, will look out for us.
Hang in there, and keep coming back for support.