Is this a family member that is putting you down? A friend? Or are these public situations?

For me there is nothing worse than a negative comment. I grew up with that and it is a major trigger for me. I have cut myself away from people who can't respect me. I've had to chat with a family member about their negativity. I am terrified of confrontation so my conversation was not directed towards them specifically. It went much like "I've been having this problem with someone and my therapist has said it is resulting in...." This seemed to do the job quite nicely.