Thinking, or thought, is the operation of the brain in conscious activity. Still widely debated as to the origins and nature of thought, it is a process behind many human actions and interactions and differs in quality from pure instinct and the adaptive unconscious. The study of human thought has been classified into several academic disciplines according to the quality of focus: psychology, philosophy, biology, physiology, psychoanalysis, and sociology. The quality of one’s thoughts may be influenced by traumatic experiences, mental health factors, emotional biases, philosophical beliefs, and so on.
Critical thinking is objectively analyzing information to make a reasoned judgement. Evaluation of data, facts, observable phenomena, and research findings is involved in critical thinking. Good critical thinkers are able to make logical conclusions from an information source, while distinguishing between useful and less useful details.
Abstract thinking refers to the ability to think about not physically present objects, principles, and ideas. This also refers to symbolic thinking. Some examples of abstract thinking are the use of metaphors and analogies, understanding relationships between verbal and non-verbal ideas, and spatial reasoning.
To stop thinking about someone look for closure. Other methods may include finding someone else to think about, thinking of their negative traits, staying busy, and most importantly, respecting yourself. In the end, remember that it will all pass, and while there might not be a short term plan, patience and initiative will go a long way.