I get a lot of anxiety about people making my life worse. For example, my landlord making me move out because they don't like me.

Then I asked myself, "What if I had to instead move because the landlord couldn't afford to keep the apartment?"

In the former, I would be so anxious, every day waiting for the call or email telling me I have to move out. 

In the latter, I'd think, "That's unfortunate, but guess there's nothing I can do about it."

The point is, I think sometimes we think there is something we can do to control people, but there isn't. Assuming we didn't do anything insane, them not liking us is their problem, not ours. 

Taking it personally is what makes us feel like we could've done something different, like get them to change their mind, etc. But we can't control people, and their emotions/beliefs are not our responsibility.