Do not give up your interests.
I loved art history in college. Are you at a big university? What city are you in? Some cities have more emphasis and awareness of the arts, and maybe that contributes to how many people at your school are interested. I would think there would be at least a few kids as interested as you.
It would be great if you had friends who had some similar interests, but people having varying interests is what makes a society. Just think of a very small town in history. A few farmers, a general store owner, a barber, a teacher, a photographer, a sheriff, a doctor, a nurse, we need people with diverse interests and talents. It also wasn’t unusual in history for artists to go to the larger cities where the arts were in bigger demand and more appreciated. Although, small cities can be Meccas for the arts. It really depends. Some schools have more emphasis on the arts, and of course there are schools that are hyper focused on theatre or dance or fashion, etc.
The arts are more of a love, while many other subjects are a like or a means to a career. My friends who are art teachers or photographers love the work, same with my friends who are pilots, they love to fly. My friends who are accountants like numbers and are good at it. I don’t think it’s the same though as dancers and artists I know.
Plenty of careers you can use your interests or your interests might be a side thing. Look into options. I do have friends who sell their artwork, are photographers for parties, do graphic design, teach art to children, and my grandfather owned an art supply store for many years, and was very inside the art circles. He was a great artist, but never sold his work.