Feeling worthless

Have you ever met someone who makes you feel less of a person. You know very well that you're not. But when you are around this person you lack self-confidence. I mean this person actually makes me feel worthless. Maybe it is my low self-esteem, I feel I'm allowing this person to walk all over me. I'm very proud of my accomplishments and what I have done, but I can't help feel a great deal of humiliation around this person. They just make me feel worthless.