One problem with alcoholics (and addicts) is that we have a warped sense of what happiness really is. It's kind of like Calvin's here:
I think it's because we get ourselves accustomed to feeling "happy" only when we're using. We like the rush; the loss of inhibitions, which gives us a feeling of power; we're excited; intense; on top of the world.
Of course, as we take in more of our substance, we lose that fleeting happiness because we keep craving more and more and more, and then we find ourselves slurring and staggering and unable to keep a thought in our heads.
When we get sober, we fear we'll never feel that kind of euphoric happiness ever again.
It's a big step when we realize that euphoria isn't what happiness is at all.
Happiness is being content. It's feeling strong within yourself even when the chips are down. It's the comfort of knowing you're doing the best you can, focusing on the people and things that are important to you. You occasionally feel euphoria when you get those "perfect moments," say, when looking at the sunset with a loved one, but you know those moments are fleeting, so you relish them. You don't live for them. Happiness is something that comes from inside you, not from without. Happiness is mostly a sense of being okay with, and loving, yourself, just the way you are with all the imperfections and flaws and talents that make you uniquely you.