He drinks all the time and smokes alot, but I really like this guy like no other!?

plus I've never had a boyfriend and I've gotten to know a few guys but this one I;ve never not stopped thinking about him and i know we both like eachother and ive never felt this way before, I have the urge just to tell him about my day but we havent got that far yet because at the moment he has gotten so shy since he got to know me he doesnt speak much online and in person he cant relax (2 many signs to tell u) BUT he smokes alot and when he started knowing i liked him as he noticed me looking he tried quitting and the drinking well i guess that wont stop since he is depressed like me u see i play music and excercise while he to remove stress / sadness drinks and smokes i know thats bad but thats his choice, but i do want to keeep talking to him and liking him.. :S what should I do? He'll never stop drinking because of the depression which I could probably talk to him about as he already opened up to me about having a bad childhood like I did. But I think if he tried hard he could stop smoking and I would then love him to bits to be honest.. i tried getting used to smoke but i just cant it puts me off i hate it