Suggest Precautions To Be Taken Post Coronary Artery Bypass Graft Surgery

my husband had a CABG 4/1-2014 he is doing well, He is 56 years old. just recently I noticed he is in deep thought about something, I ask him all the time if he is ok. I think It bothers him I ask all the time. just worry about him.
what can I do or say to help him.