Husband will not quit smoking

My husband and I where both smokers before I got pregnant. I of course quit the minute I found out and my DH said he would to for the baby and to support me. Well he lasted a month, and went to dipping snuss and drinking beer 3 days a week, and every weekend. Then last week he said he would quit all together because it was so stupid and he was ready. Well, I found out this weekend (the hard way) becuase he was so angry and grumpy, that he had been smoking all week at work and didn't bother to tell  me at all. We have a very honest relationship, and I can not belive he lied to me. I know how hard it is to quit, and can't belive I did it myself, but I guess the difference is I didn't have a chance, and he does. But it hurts my feelings that he can not man up, and quit for himself and his soon to be child. Am I being to selfish? Overreacting? I was told by some friends that I should just chill out and that he is so stressed out and I should not push him. He will come to his own reality the moment he lays eyes on his baby, and that woman are different because we are constantly feeling the baby. I don't kjnow what to think anymore, I just miss my husband and best friend. I don't want to tell him to smoke and I in no way accept it, but I don't know what else to do. The stress is not good for the baby, but neither is second hand smoke. Help!