That is what the internet is for. Personally there are very few people in my life who I can have a deep intellectual conversation with. Not that everyone in my life is stupid or they are all idiots, far from it. But, they just are not all that educated in book smarts, mostly common sense and street smarts.

What I suggest is finding a message forum, not too much unlike this one, where you can discuss things that you enjoy (astrology, science, math, literature, etc.) and keep posting topics there regularly. If you search the internet long enough I know you can find one.

Also, not sure what your particular level of education is, but have you thought about going back to school again? That could be a great way to find other people to have deeper conversations with, even if you only take one class here and there it would probably help.