All you really can do is be upfront with them, telling them it's too early to be so open about the new relationship on FB, especially since he's a FB friend as well. Your friends should understand. Nobody wants the new guy to feel uncomfortable. Be aware that if your friends make a comment on a status that new guy has already commented on, and you delete your friends' comments, new guy could still see what your friends said via e-mail notification.
12/20/10 at 11:00am