Your feelings, emotions, and expressions thereof make other people uncomfortable. That's it. Essentially these three phrases above (and many more) are designed to help the person you are being vulnerable to escape your emotions which they are not willing to deal with. It has nothing to do with you as a person. Nothing to do with your being weak, or emotionally unstable. No, it has to do with other people not wanting to confront their own emotions by having to deal with yours.