I know this post is old, but I know this has happened to other people too and is still relevant.
Some people that I wasn't able to stay friends with in the past have been messaging me recently, asking me how I am, and trying to get together with me. One of them, who wasn't religious in the past, told me that she is a Christian now and that I should get a tattoo of a cross

(She was my friend way back when I believed in Christianity) and she was disappointed when I told her that I don't believe in religions anymore.
And what's weird is these are people that I usually had to do most of the work to maintain my friendship with them. I can't declare that they are dark because I don't know, but it wouldn't really surprise me if I found out they were. Anyways, I think my relationships with them did me more harm than good so I'm avoiding them.
I'll never understand why some people just randomly try to come back into your life after you gave up after trying so hard to please them.