Create friends list/s if you have not already done so:
http://blog.facebook.com/blog.php?post=84283397130
To filter one friend, create a friend list with only that user on it. From the chat menu, select "friend lists;" from the "display these lists in chat" select the list with the user you wish to filter, and use the "go offline" button to filter the friend from the chat window. The chat window should display all online friends except for the user you do not wish to chat with.
A good FaceBook status for this situation is, "Treat me like a joke, and I'll leave you like it's funny."
No
putt @(friend name) example @mark zu
The person who subscribed to you will recieve all of your status updates.
unless you are on a discussion wall / a mutual friend's wall, you cannot like someones comment or status
no you can't unless that person does not have any privacy settings on their page.
A status on facebook is what are you doing right now or your main message on your facebook homepage.
You do: <3 in the Facebook status.
Yes, Make sure you accept friend requests as well.
Yes
thats easy first check his relationship status on facebook!
The invisible is a type of Google Chat status. It means that the person is not visible what he/she is doing. The available is the default status in Gmail.