I'm starting to feel really alienated and pushed away by people because of how I see the world and other humans, and how people criticise me for it. 
I always assumed my way of seeing things was reasonable and realistic considering my situation as a human. However, different people and mental health specialists say that my worldview is very warped and self-centered. Some psychologists even go as far as to say that I'm "narcissistic" and oblivious towards other people's feelings. 

I once explained my understanding of social relations as this: I am a social animal, and my brain works off the pleasure system in place. I stay with people that provide me with some type of positive experience, and move away from those that make me consistently displeased. 

To that, I was told that it was normal to be around people for their sake and not your own. That I should take pleasure in their company purely because they take pleasure in mine, and not because they can provide me with anything. I find this very odd, and I struggle to think that anyone actually works this way. I've never met someone who'd take pleasure in being around someone who has a negative impact on them just because the other person enjoys it. Sounds awfully masochistic in my opinion. 

The next criticism lies within how I determine someone's "value". I often say that the value someone has to me is based off the payoff I get from being near them. Whether it is because I enjoy having conversations with them or because they have some type of practical use, like being calming or emotionally supportive. Again, they tell me this is abnormal. That I shouldn't differentiate between people and see different values in them. I think that's a pretty normal thing to do, and I never claim that these values are inherent or objective. They're just personal to me. 

I don't really have a problem with these tendencies being pointed out, but I do have a problem with how I'm being told that I'm abnormal and flawed. I'm actually really confused due to this. If I am abnormal, what can others see and experience that I can't? Do they have some type of sixth sense that allows them to see people as beautiful clouds of energy, all with unique and inherently valuable qualities? I'm pretty sure I have all the same senses as other people, so how can I consistently be described as abnormal and cold?

Before more people theorise about the narcissistic personality disorder claim, the psychologists who talked about that did not end up giving that diagnosis. It was a heat of the moment thing, but I still didn't like how that was brought up in such a way.  My diagnosis is Schizotypal (personality) disorder and nothing else. 

My question(s) would be, is this really that weird? Why are people so angry and passionate about what I see as perfectly reasonable ways of understanding others? The majority of people who know me make the same comments about my apparent egoism and coldness, so there must be something wrong. I just don't understand what others see that I don't. So I'd greatly appreciate it if someone could make me understand this a bit more. And as a pointer, acting like something is inherent and obvious is only going to confuse me more. If something like empathy is brought up, I can only really understand it if it's described in terms of simple rules and mechanisms. Sorry for the long post.