I think I am going to ghost someone I know.
Is this related to social image, or the lack of it?
Absolutely not. It's all about social image. I'm doing that because I feel like it and I like to pretend I'm a bigger person than I really am.
It is rude to abandon someone without an explanation. If you don't like them any more you should let them know. Do they know you are ghosting them yet?
No, but I still feel like ghosting.
It is really rude to ignore someone. I think you should just tell them the truth then you won't have to deal with it again.