how to move on from someone you're obliged to keep in touch with?

you don't believe it though

@ThePenguin what can I say...my logical minds knows that I'm not obligated...and when the time comes, even this person would understand why I can no longer talk to them.... it's just that..it would be very weird to suddenly not talk/meet them since we have very very close common friends (who have no idea about us)- they keep making plans to hangout- all of us and have made us all part of their groups on almost all social media...so I keep getting updates about them....and there's a limit to which you can avoid something that has become as basic as whatsapp.

no your logical mind doesn't know that. It wants to be with that person. You can try to just stay away from the whole circle for a few days though.