you can't.
You can't unblock yourself. They have to unblock you by going to your page and hitting "unblock friend" It should be right where it usually says "Block Friend" If they just un-friended you then try re-adding them. If they don't unblock/re-add you they obviously just don't want to be your Facebook friend anymore.
To gain access to FaceBook you need to ask the person who blocked it to unblock it for you.
unblock yourself from what? so need to write more
If you would like to unblock someone from facebook, simply go to your account settings and click on a button that says "Blocking". Once clicked on, you can see a list of people or a person previously blocked and simply click unblock and you are done.
Well you can't.
Send an email to the Facebook Help Centre.
yes you can unblock friends on myspace i did it today so not being rude dont say you cant unblock friends :) have a nice day (can leave comments)
No. they will not
Contact your systems administrator.
Patience
5best1sDOTcom/unblock-youtube/