How can I let someone to follow me but not vice versa?

It doesn't work anymore. I used to be able to let someone to follow me without me following them. Now it seems that Follower must be also the followee as well. If I delete them on my "Following" list, they'll also get deleted from my "Followers" list. OK i'm getting a heading saying the Follow word. Can you please help?
 
sad I’m frustrated
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