Looking for love from these people is frustrating at best. It's better, perhaps, to cease expecting anything from them, and to join them in the realm of their carefully chosen safely discussible topics, and to have compassion for their limited ability to access the contents of their soul. These people love us simply by showing up and making conversation. For now, and maybe forever, it's the best they can do.
I accept people's differing levels of conversational comfort, and understand that the personal is too personal for some.