My boyfriend is a drinker, so I'm worried.
That alcoholic is drinking in the morning again today.
My wife is a drinker and I’m worried about her becoming an alcoholic.
When you like alcohol a lot, you're probably a heavy drinker.
The reading is all kun'yomi vocab reading here as you can probably guess from the hiragana sticking out on the end. You should know the readings of these as separate words already (酒 and 好き) which means all you need to pay attention to is the rendaku of すき to ずき.