When one has a feeling the process usually articluated is the mechanism of tension followed by expression and then relaxation. This originally came from the work of Wilhelm Reich who plays a major role in this aspect of human functioning. He presented the powerful yet simple model of a feeling involving firstly tension followed by expression and then relaxation.
This upon reflection this is too one dimensional. On occasion feelings occur in the context of a relationship or at least whilst in relational contact. One may have a feeling reaction to another person directly or one may express a feeling about something else but in the company of another.
One could argue the response the other party plays is crucial to how successful the emotion is dealt with. Hence we arrive at the vulnerability anxiety equation.