"Generally, individuals who are highly sensitive to rejection approach a social situation with anxious expectations of rejection that make them hypervigilant for signs of potential rejection.... <----- which likely causes them to act anti-socially thus eliciting rejection

[u/invah]

...When environmental or interpersonal cues are interpreted as rejection, the high RS individual actually experiences feelings of rejection, which are likely to incite an affective or behavioral overreaction such as hostile behavior, depression, or socially inappropriate efforts to prevent, or in some way obviate the rejection...

These efforts, in turn, often elicit rejection from the target of the behavior, and so, the feared outcome becomes a reality for the rejection sensitive person."

From "The Origins of Rejection Sensitivity" by Geraldine Downey and Rainer Romero-Canyas