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.