A wise answer that many have given here on SR is give up alcohol for one month. If you find that you can give it up easily then you are probably a heavy drinker that needs to cut back.
If you find that you are plagued by mental obsessions to drink, cannot stop, and experience physical cravings, you are probably an alcoholic and need to stop drinking.
Don't be afraid to walk into the rooms.
You will discover a whole new life there and amazing people that you will want in your life.