I've been alcohol free for 10 days now.... Captain Morgan rum and diet coke were my downfall! Until I decided to stop drinking, I hadn't realized how much I was drinking and I don't miss it. (Still have to have a Diet Coke ever once in awhile.) Now that I'm "old married woman" - j/k- most of my drinking was in friend's homes and/or at dinner out. I just tell people that I don't NEED alcohol and I'm healthier without it. (Otherwise, my friends and family would have all thought that I was pregnant!
Luckily, they all support me! If your friends are being difficult, reassure them that this is a personal decision for YOUR HEALTH and NOT an indictment on THEIR BEHAVIOR. Any change is hard on people, but if you don't make a big deal of it and continue to be yourself, your friends won't make a big deal of it either. Good Luck!