People like your crush who don't smoke and/or drink often abstain for values, health reasons, or because there is a significant trauma in their personal background (i.e., their parent was alcoholic and they avoid alcohol altogether). Unfortunately, your drinking and smoking are indicators that your values and health priorities differ from his, perhaps significantly. That may or may not be important to him. The fact that you're thinking about it makes me believe you feel guilty or you know that he disagrees with your choices. Have a conversation with him. If he means that much to you, consider making changes to your habits.
I strongly encourage you to stop smoking altogether for your own health. (It's a huge turnoff to kiss a smoker. From a partner's perspective, it's like licking an ashtray. Also know that there's no breath mint, spray or gum that can hide smoker's breath. Sorry.)