Answer:
According to Erikson's psychosocial theory, this indicates that Edwin did not successfully resolve the [INFANCY] stage of development, which in turn is causing him to experience [ISOLATION] in his current developmental stage.
Explanation:
In infancy, Edwin was neglected, which, according to Erikson's Theory makes him mistrustful. Judging by the break-up with his gf, Edwin has isolated himself by his own doing, leading to him occupying the Isolation stage of young adulthood.