I would suggest that you find a therapist who is experienced with psychopathy and see them. Although a lot of people who are psychopaths do terrible things, not everyone does and empathetic SEEMING behaviors can be learned and be beneficial. It seems like this is bothering you and getting a diagnosis and learning how to read other people’s emotions and respond appropriately might help. Even if you aren’t actually feeling it, you could put them at ease and fit in better. Radical truth is great and all but little white lies get told for a reason and that’s something it might help you to learn.