Some people like beer the first time they ever have it, but for many, it’s an acquired taste. And I won’t say that anybody can learn to enjoy anything, but most people, if they can convince themselves to try a new thing enough times (I’ve heard 20 as a benchmark), will learn to appreciate it. That’s probably a survival instinct, when you think about it: if you have something 20 times and it hasn’t hurt you, your aversion to a perfectly good source of calories is likely not a useful one.
All of which is to say, if you have a partner that’s interested in trying beer because it’s a way of sharing one of your main interests, that’s a great thing, and if you approach it the right way, it has a good chance of working out. Maybe not for everyone—some people are innately intolerant of alcohol, and others hypersensitive to bitterness—but for most.
So keep an open mind. Stay low-key. Try lots of things. Think in terms of bitterness, maltiness, hoppiness, roast, esters, and phenols. Teach them to think in these terms, and encourage them to express which aspects of a beer they do or don’t like.
Most of us who are enthusiasts know that a blanket statement — “I don’t like beer” — doesn’t really make sense, because there’s so little similarity between an IPA, a Doppelbock, a Tripel, a stout, a Pilsner, or a Belgian sour. Chances are good (again, assuming no unusual aversions to alcohol or bitterness) that if you don’t put someone off and can encourage them to keep trying, the space is big enough for them to find things they like.