Go to the privacy setting in your account and change it to the setting that only allows your friends to see your photos.
Probably not.
Look through someone that is friends with them, they might have a picture with them tagged in it.
Yes, i guess they could, theres no way to hide your comments, only by deleting them.
You can't. Facebook does not support unliking a post on Facebook by someone who is no longer a friend
depends on who it is?
Add them.
Look on Facebook for people you know who are or who might be his friends - they will probably have him as their friend on their Facebook pages. You can examine all their friend pictures and the chances are good that he'll be there. If he's chosen a weird picture, as some people do, you'll not find him.
When someone adds you as a friend on Facebook, you have the option of accepting their friend request. When you send out a friend request, you are notified by Facebook if that request has been accepted.
A mutual friend is someone who has one of your friends as a friend.
A friend on Facebook is someone you have a connection to-- given the access that you have been granted to view their profile and socialize with.
Do you mean block or delete? If you delete them, they will not appear on your friends list, however they will not be told that you have deleted them; they will just not be able to find you on their list. If you block them, however, I think that you will still appear as a friend on their facebook friend list, but they will not be able to make any comments or anything on things you post on your profile. So think carefully!! and why are you blocking them if they are your friend?!
Mutral friend