Well it took me over a month to figure this out; a problem i could have solved in a few minutes with common sense (i have none) and computer literacy (i have little). To un-ban a friend that you have accidentally banned from commenting to your journal. pause your cursor at the "Friends" tab and go to the bottom of the menu which will appear. Click on "Ban or Unban; a list of all the people you have banned appears, check the square in front of the friends user name and save the change. A month long problem solved in under a minute! Will i ever learn? Now i just have to apologize to the friend.