I've been with my current partner for 4 years. When we met he took drugs, drank and smoked a lot. I knew this about him but it didn't bother me much. He has a very successful career and in his words 'works and plays' hard.
The relationship has been and is relatively fine. He recently proposed and I said yes. However I recently had a conversation with him in which I told him that if we are going to get married and have a family then he needs to change his lifestyle. I can't imagine leaving a child in the care of someone on cocaine whilst holding a beer.
In his opinion, which is true, I met him when he was as he has always been. I agree that his lifestyle has never been a problem for me this far and he's always been a caring a respective partner. He thinks the next step is to get married and have children. He thinks that he obviously won't be doing drugs and drinking in front of the children but I want him to stop entirely.
Would this be a deal breaker for you, all else being fine?