Interpersonal relationships are social associations, connections, or affiliations between two or more people. They vary in differing levels of intimacy and sharing, implying the discovery or establishment of common ground, and may be centered around something(s) shared in common. The study of relationships is of concern to sociology, psychology and anthropology.
a) Uncertainty reduction - through eye contact, identification, opening disclosure, etc.
b) Perceptual - notice how a person looks at the other and their body language.
c) Interactional cues - nodding, maintaining eye contact, etc.
d) Invitational - encouraging the relationship (e.g. asking if they want to meet up later for coffee)
e) Avoidance strategies - if one person discloses and the other does not, minimal response, lack of eye contact, etc.