What does he say when you confront him with what you need him to be for you? Do you really support him and love him thru thick and thin? If you went thru some hard times yourself would you be ok if he felt the same as you are feeling now? Did you ever or do you now have any no so good habits? Do you really trust him when he gives you his word? Personally, I could never get too serious with a regular drinker, heavy smoker, or anyone who uses harmful drugs so I can see your points and they are valid for you. It sounds like you have a lot of fear about getting serious with this person and that is no way to enter into bringing a child into the world. I pray things work out for you and for him. Blessings to you!