Correct spelling, explanation: despite the old form affrayed, we now spell the word afraid with just one f. This is probably due to the fact, that double f wasn’t pronounced anyway. Afraid is a modern, simplified form and other forms, like affraid, are incorrect.

Definition of afraid:
adjective, scared or worried about something
I’m a little bit afraid of heights.
Kate told me she was afraid our plan wouldn’t work out.

Incorrect spelling, explanation: this form, affraid, with double f, is nowadays incorrect, although there is an archaic form affrayed. However nowadays afraid is simplified to one f, probably because of the fact, that double f was pronounced as one. Therefore afraid is the correct form.

Incorrect spelling

Incorrect spelling

Incorrect spelling

Incorrect spelling