There are several things you should keep in mind:
1) People often know whether another is being authentic or not. This means that if you deep down are an outspoken person, but try to act tame to fit in (or vice versa) people will know. People know if your trying to be something different or not. I invite you to try this- go people watching some time and after some time (it may be difficult at first) you will begin to see whether someone is authentic or just a “sell-out” I call them. Yes, there are many people that are very outspoken, but so many people try to be a “hot-shot” popular person, that it’s really off-putting. Once you notice this in others you will notice this in yourself

2) Authentic people are generally more attractive than people trying to be someone else. When you are trying something else people can tell you are dissatisfied with the way you are, and not sure who you really are. They feel uncomfortable. Just be yourself, and more people will be attracted to you.

3) Lastly, being yourself does not mean trying to find who you are and then being it. Who you are changes all the time, it changes every day. What matters is that you do things the way that feels natural. Even certain things about you that you think are silly, really arn’t silly. If you act the way you want to act people will just find that normal, and look at that as you. They won’t laugh and say you are odd. People will only find you odd if you try to act as something that you are not. Oddness is not how you act, but how comfortable you are with the way you act.

These things take time, so don’t worry about it. That’s good that you are cutting back on drinking. Live a healthy life style and make sure to do things that keep you happy. Once you are healthy and happy things will seem better and you can act authentically.