Just unfriend them. I doubt they will ask and if they do just give a short answer sweet response like “for privacy reasons, I’ve decided to keep my social media for only close family and friends for privacy”. You need nor owe anyone an explanation. I’m the same way, I have no coworkers on my social media.
You can set your posts so they can't see them but still be friends with them. That way it shows you're still friends with them but you just don't seem to post at all.
You can set them to restricted so they only see your public posts, but remain on your friend list. Go to their profile, click Friends, click Edit Friend List, choose Restricted.
Just unfriend them. If they ask say Facebook must of done that… as Facebook does do that! Do why but they delete ppl at random off my list haha 🤣
Go on about deleting social media and making resolutions and all that, then block them. They won’t know that you didn’t just delete
Restrict posts on what they can see it's super easy to do & tbh I do it all the time saves that awkward you feel like you had to accept their friend request and if you then unfriended them it would just be weird so this way you're still friends with them on there but they can't see what you post it's a win win
To be honest, I’d just unfriend them. They probably won’t notice at all. And if they do notice, they might think it’s strange, but aren’t likely to actually mention it directly to you.