Why is he only affectionate when he's drinking?

I have been seeing this guy for almost three months. He initiates contact almost all the time, has instructed me to his friends and in general seems to like me. Even tho he hugs, kisses or says sweet things only when he's drinking. I'm confused a little, could he be a little shy or just not that into me?
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+1 y
Not drunk, but after a few drinks.
Why is he only affectionate when he's drinking?
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