Personally, I suggest you shouldn't talk to Bob, Sophie nor Sarah at all because they don't sound like a healthy set of friends. It sounds harsh, but they're all the reason you're here seeking advice on what to do about them; doubting them, worried about them, considering never talking to them again. One of them blocked you... The other spread rumours about you. Two of them made high school a bad experience for you. They don't sound like ''friends'', if I'm honest.

No good friendship entails rumours, gossiping, trust issues, passive aggressive social media behaviour. Sophie doesn't sound like a person you can trust. Bob knows too much. Sarah isn't taking your side. Please realize that if you end contact with these people nothing bad will happen. The world won't end. There are much better people to socialise with out there, lol.

One of them blocked you so you're already one down. I wish you the very best in this situation!!