Classical music grows on you, as meli said. But you have to be interested and at least try to listen to a piece to start the adventure.
I know very few who likes classical music in my age (I'm 16). Actually I know none, except I know about a girl at 15 who has an incredible talent for the violin, but that's like it. The rest is adults...
In music class the teacher often plays classical music for the students, but the students don't react as bad as lufia has experienced:P Though they're not interested at all and don't take any attention to the music, they just wait and look forward till it's finished... I think it's sad, since classical music has so much depth to offer and so many varieties everyone can find something they like and once you like it you don't understand how you couldn't like it before/how you can live without it. But I think it is partly the music-teacher's fault in school as well (at least on my school), she tends to play very special pieces, or -very- complicated pieces or baroque music. I would think the easiest route into classical music is through the romantic period, because people are moved by it more easily(this can of course be discussed:P)
But most important people must be open to classical music and at least partly interested in listening to it, to be curious of what it really is. If not, it just won't work in most cases I think..
Around me it's like: "You LIKE classical music?? Are you like... serious?"
lol, It's pretty frustrating...
To me classical music is everything, I listen to other music as well, but classical music is 90% of the music I listen to, and if I'm moody, classical is almost the only thing that works. People think Coldplay is deep and moody (don't get me wrong, I like Coldplay) though there's classical music a lot more deep, people just don't know it, and don't want to know..