Will that make people less lonely? Pretending we like each other?
That's not what being friendly is.
It's more about treating others with kindness and respect.
That'll make us less lonely? To be clear, I treat my coworkers with respect and kindness, but I don't put myself in a position where I get close to them or look to them for support or my emotional well being.
Do you not like any of them?
They are perfectly fine people, but I have no desire to become comfortable enough with them that I feel less lonely. That implies some sort of intimacy, where I rely on or confide in them, it's being vulnerable really, and I keep my work life professional and my personal life private.