In murkier cases, start by exploring why you're having such a strong reaction.
Try entertaining the notion that your dislike may have to do with your own baggage.
If it's that you don't like the person, figure out why.
Have a heart-to-heart in which you ask your friend's help in understanding this other person, and ask yourself if your dislike has anything to do with your own baggage.
"She'd just been through a tumultuous divorce," says Elizabeth. And he proceeded to get desperately drunk at dinner. Should she say something and threaten her relationship with her sister? But the truth is, we all bring hidden biases to the table and we need to examine them before we speak up, she says.