If you accidently added/liked someone who actually rejected you

Depends on the situation and how you were rejected.

Heck if you are being rejected through a block there really isn't much you can do. Only others can intervene.

Note they actually have the ability to remove you themselves from their follow list. And in a couple of ways. You wouldn't know either way unless you checked.

Been rejected enough its nobig deal

Unlike, then never look back

Let it ride and see what happens

Nothing. Undo and move on.

Ask them for nudes

I would be ok