@Whynot: "...I lost ALL my friends."
I hear you. One thing that became painfully obvious to, though, was...
You can't lose something you never had.
I remember that dilemma of being a fully-fledged adult looking on at other groups of people in their little social network. I felt so despondent at the thought of having no one to call on. No one to hang out with. No one to trade stories with. All of that was snatched away with the cult, as you've experienced.
I was an outsider looking in at sometimes decades-long friendships that people all around me were sharing. Shopping malls, cafes, social media - everywhere I looked was a painful reminder that I was a newcomer into this world.
Maybe your child's upcoming "Appreciation Day" will be a good opportunity to meet some other parents of the invited kids. Swap numbers without a few people. Chances of them becoming your BFF are slim. But it's through this act of networking that you might just meet a fellow soul that really clicks with you on a social level.
Postmodern artist, Dulce Ruby, wrote: "Sometimes your circle decreases in size, but increases in value." I think that's a good one to keep in mind.