To tell the truth, friends can of course be made, but abstinence from alcohol and smoking will definitely affect their making friends, just like ordinary brothers going out for a drink and having fun. I don't drink, smoke or go out to play with others, which will definitely affect the feelings between friends. Even if you are together, your friend will give you a toast, but you don't drink it. Even if your friend doesn't say it on face, you will definitely mind.