Hi and Welcome,
Alcohol will take everything from you, not just a few pounds of muscle. It nearly killed me, and it took me 20 long and painful years to realize I will never be able to drink in moderation.
As for being bored, there are a billion sober hobbies you can take on. Just use your imagination. Problem is most likely like mine when younger, the only way to come out of my shell was with some beers in me.
Good luck!