I would not contact friend not yet.... advice I've gotten over and over again... If this is a friend that you normally wouldn't talk too regularly then leave it... in time you might find you can but for now I wouldn't... I wanted to do the same to my H friend but was instructed not too...
Friends are really one small influence and in reality I've learned they aren't going to fix or really help him .. .just will give him another outlook...
hang in there....
Me: 38/H:40 M:7yrs TG: 10yrs 2Girls: 4yr & 7 month old Bomb 8/22/08 OW/EA/PA 8/23/08 with 25yr old Moved out 9/22/08