Or he could date someone who doesn't want to go out to parties and drink. The way you're peddling your toxic advice as some universal truth is disturbing.
If a party is 3 friends hanging out and drinking beer, which is what I did for the Super Bowl, and someone's unwilling to do that (with soda and pizza), does your opinion change?
"Parties" don't have a universal definition.
No one's saying he needs to head to EDM shows and roll next weekend. Or get carried home by friends because he's too drunk to function.
We're saying that "I'm introverted and don't like to do anything social, why I can't meet anyone?" is such a frequent question here and it's almost always an excuse from someone unwilling to put in a modicum of effort.
I'm also an introvert. I need recharge time. But I also realized that all relationships (including friendships) require maintenance.
There would be no issue if such a person regularly met up with with friends for board game night, volunteering, book club, or even nights cooking together.
But sorry ERA (and this isn't directed at anyone in particular; it's a general statement): if you never leave your house, there's a pretty good chance you'll actually be forever alone.