Wolvesascent, happiness is rooted in your beliefs. Believe that you will be happy you will be happy. Look for the positives of not drinking and positively reinforce these in your mind. Savour the good feelings about being sober.
Never lose sight of the damage that alcohol causes and the difficulties it caused you personally.
Think into the future and see an image of yourself happy and content without alcohol. Notice the benefits of not drinking and be thankful for them.
There is no reason that you will not regain the previous fun you in life before drinking. You just need to practice and experience being in that state of mind.