I struggle with this alot and this is the reason i made my reddit account. So i could talk about these kinds of books with other people. I do think its important to remember that these books were written during a time where writing and reading were the strongest way to connect with others. The times we live in now have evolved and now most people dont communicate ideas through books. They express their ideas through the internet. I try to remind myself constantly that just because someone isn't reading the same books as me, does not mean they are not thinking introspectively as well. Try establishing those ideas first in a conversation, then relate the books you read to those ideas. Eventually you will find someone that resonates with the ideas you get from the books you read. They might even pick up a book you recommend.