Im pretty sure that only your friend's can see your friend list on FaceBook...
Yes
Facebook has not introduced this service yet.
go on her facebook page
Mutral friend
When a Facebook friend is online, there will be an icon displayed by their name in the friend list. This also indicates that instant messaging can take place.
The Facebook can delete her/him from facebook if he/she has been reported few times. You can remove a friend from your friends list by going to a friend's page and at bottom left corner there's a Remove button.
obviously, you weren't a good friend...
No, he or she won't receive a notification, but you will disappear from the Friend list.
Yes, Yes you can
add them to your friend list ;)
If a friend removed you, you won't see them in your friend's list and you wouldn't be able to chat with them.