I think that the key to socialising is taking genuine interest in other people, not "pretending to care for the sake of socializing".
I'm genuinely interested in people here on HN. In people I see presenting conferences I watch. In people who share my interests. I don't believe I can manufacture genuine interest. It's supposed to come naturally. However, if I don't even try to at least pretend to care then I will literally not talk to anyone for large portions of time.
Thanks for the advice though.