How can i be friends again with someone i blocked on facebook?

[Ruby]

i left my facebook open and my little sister blocked a friend is their a way to unblock them??

[Lexi Brown]

Just go onto the settings, and try to find "blocks/friends," or something like that, and try to unblock them under there. I am almost positive there is a blocking button under settings. (I haven't been on FB for like 3 months) Hope this helped!!

[Ag]

go to your privacy settings----> blocked people and apps (at the very bottom)-->manage blocking-->unblock your friend. It should show you the name then on the side you click unblock (: I think you have to send your friend a friend request(I'm not sure)