@InnueSorry if this seems rather brusque, but don't you think
five days is a bit lenient for him to simply say he has an interest in posting, after it has been 8 already, and he has been online multiple times within those days with no word?
I'm just requesting that out of common courtesy to me that he has 24 hours to inform you he intends to post, and then 24 hours following to get out a post, offering a total of 48 extra hours(10 total days, assuming he waits until the very last minute for both) to respond. Does this sound fair?
Edit: Considering it's been 9 days by this point, actually, it's closer to 11 days absent.