How about getting a blank one and writing something a little less mushy in it. Maybe about how much you admire the things he has done for himself over the years, how he has grown (lots of good WOA even if you don't appreciate all of it) how you like his spontaneity (read unreliability!) his passion (read emotional/irritable!) etc. I'm mean, I know.
Do it with no expectations. Let him decide what happens with it. But I think since he has moved back home it is important to acknowledge things. Ignoring the date completely was probably appropriate the last 2/3 years, now it seems like it has the potential to cause more emotional rifts.
Michelle - Proud DR Rockette S: 28JUL07, D'd: 29OCT09 http://tinyurl.com/27j9qo2