How can i unblock someone from facebook?

Click at the top right of Facebook and choose Settings. Go to the left side of Facebook and click Blocking In the Block Users section you should see a list of people you've blocked. read more

Go to your Facebook settings and click on the Blocking button. Scroll through the list of blocked users until you find your friend's name. Press the Unblock button. You will then have to send them a friend request if you want them back on your friend's list because once you block someone, that also takes them off of your friend's list. read more

Whether you mistakenly blocked someone or simply wish to let bygones be bygones, you can unblock a contact on Facebook and allow her to contact you again by clicking on Unblock next to that person's name in the Blocked Users window. read more