It's not all or nothing. I may like the guy I'm sitting next to and try to help him out where I can, but I'm not going to sacrifice my career if he makes a mistake that dooms him.

If a coworker I like suddenly passes I'm not going to mourn for weeks, I'm going to say "that's a bummer" and go on with my life. But that doesn't mean I am completely devoid of caring for them.