My friend posted on my facebook wall, without deleting it, can I change the privacy settings?

[jaw dropper]

My friend and I just had a conversation of like 50 comments on Facebook. I let the comments get long because I thought that I could change the privacy settings butttttttttttttttttt I can't. When I try to change the privacy settings, it says that My Friends can view it. HOW DO I CHANGE IT TO WHERE ONLY HIM AND I CAN SEE THE STATUS WITH COMMENTS?

THANKS IN ADVANCE!!
I was hoping you wouldn't say that... Thanks for the inside details!! Thanks for answering so quickly ! Hope you have a great last week of 2012 and a great 2013 !
I was hoping you wouldn't say that... Thanks for the inside details!! Thanks for answering so quickly ! Hope you have a great last week of 2012 and a great 2013 !

[Stefani_Cookie]

You can't anymore. Because you or him already posted the status without putting it on private.. But one thing you can do is put another status and set it to private and tag him on that status. But yeah you can't change that old status to private anymore so unless you don't want other people to see your convo then delete it ASAP!

[Black]

you are not . but you can off tagging and posting in your timeline . if anyone tag you, a notification come to you , if you approve that tag will show .

http://www.facebook.com/help/106105072867502/ THIS LINK HELP YOU TO KNOW BETTER FACEBOOK