They don’t smile when they see you.

A genuine smile is hard to fake, so if someone doesn’t smile when they see you, it’s a pretty good indication that they’re not happy to see you. This is especially true if they smile at everyone else but you. It may seem like a small thing, but it can be really hurtful. The next time you see someone you don’t get along with, take a close look at their face. Chances are, they won’t be smiling.