Is talking about Disney movies like Frozen as an adult and really enjoying the movies a bad thing?

I 17, turning 18 this year, in 12th grade, senior year, just three weeks away from graduating high school, Male, really enjoy Disney movies, especially Frozen, and even talking about them, like a lot, there were times I was called childish a lot for that, and told that Disney movies are just for kids, when I was 15, when I was in 10th grade, when I was a sophomore. And this year, in my Reading Lab class, last Friday, and even before, a classmate of mine, always said "I LOVE Frozen! Like OH MY GOSH! I LOVE Frozen!" but based on the way she said it, she doesn't really love Disney movies like Frozen, she was just faking it. She was faking her personality to get my attention, and on top of that, giggled about it, about something that's not funny. Basically, in my face, when she said that she loves Disney movies like Frozen, I could easily tell she was faking her personality, but in her head and behind my back, shaming me for liking Disney movies like Frozen. Is it weird to talk about the movies as a grown adult?