Can't you think of any circumstances where a friend's declared poor opinion of something that you like would take the sparkle off it for you a bit? Assuming this friend is someone you like and respect, obviously.
Like if you, I dunno, chose yourself a lovely new coat for the winter, and the first time your friend saw you in it, said "I don't know why you always buy such frumpy, old-fashioned coats. Don't you want to look stylish? You should treat yourself to something really nice and elegant, not that dingy old stuff."
Even if you really loved the coat, and still loved it, isn't there a chance that for a while, every time you put it on, instead of just being able to enjoy feeling pleased with your lovely new coat, you'd also remember your friend (who you like and respect) going on about how she thought it was old-fashioned, and telling you that your coat wasn't good enough? The coat would remind you of the fact your friend thinks you're frumpy.
And then it's possible that the well-documented normal human tendency to (subconsciously?) wish to align our preferences and dislikes with those of other people we like (and the opposite with people we dislike) might kick in, so maybe your brain starts to pick at it for flaws, making you think you've started to notice that the buttons are possibly a little passé, and perhaps the cut isn't as flattering as you thought…
None of which means you didn't and don't genuinely really love the coat — just that your friend's vehement dislike for it, the possible implication that it reflects poorly on you as a person and you should do better for yourself, and your niggling feeling that everyone who sees you in it might think you're an old frump, means that your brain is trying to reconcile "I like and respect friend" with "friend thinks my coat is frumpy". Even if you brush it off and manage to enjoy wearing the new coat you love, there's still that cognitive tension and emotional negativity attached to the coat.
Or maybe a coat wouldn't be the thing that would do it for you. Maybe you remember being a kid or a teenager, and far less experienced at brushing off social pressures like this, and remember feeling different about some music you loved after hearing someone you liked and respected slagging it off.
I talk about taking the sparkle off because for me, when OP says "her comments have kind of ruined it", I don't read that necessarily as "her comments have utterly destroyed any chance of enjoying any part of this holiday I was previously looking forward to" — with the "kind of", I read it as something more like it's spoiling the anticipation, and she's worried she won't be able to wholeheartedly enjoy the holiday in the same way, with that "you're boring" implication echoing round in her head from time to time. Maybe I'm wrong there, and OP really does mean the holiday is totally and irredeemably wrecked now, and TBH that would be overdramatic.
I think that maybe being aware of cognitive balance theory, and the human tendency to try and minimise conflict between our own personal preferences and those of people we like and respect, might help OP see that a lot of her new misgivings about her holiday can be put down to a quirk of normal human psychology. When she starts to think something like "maybe my holidays are boring, and everyone else thinks I'm boring too" she can remind herself that no, that's just her brain trying to make everything nice and matchy, which is normal but not necessarily reflective of how she really feels.