Why cant I see my friend of Facebook?

[Nicky]

Sooo i blocked my friend on Facebook just for fun and when i wanted to unblock him it says ( you should wait 24/48 hours before unblocking someone ) so i unblocked him immediately after that time but now i cant find him, chat him, see his comments, etc. (his name is black in our old messages so i cant click it) and no he is not in my block user list.
how should i fix that ??????

[arundirect]

Once you unblock someone, it does not automatically restore the friend connection. You will need to lookup for their profile and add them again. You may not be able to add them if them have blocked you or have left Facebook. Good luck!

[Melinda]

Send them a new friend request. After they accept you, you will be able to access their wall again.