Assignment task: Please read the below paragraph and answer the questions.
1. What is Mike's diagnosis?
2. Identify and explain the diagnosis.
Mike is a 37-year-old male who recently moved back in with his parents after his fiancée was killed by a drunk driver 3 months ago. His fiancée, a beautiful young woman he'd been dating for the past 4 years, was walking across a busy intersection to meet him for lunch one day. He still vividly remembers the horrific scene as the drunk driver ran the red light, plowing down his fiancée right before his eyes. He raced to her side, embracing her crumpled, bloody body as she died in his arms in the middle of the crosswalk. No matter how hard he tries to forget, he frequently finds himself reliving the entire incident as if it was happening all over Since the accident, Mike has been plagued with nightmares about the accident almost every night. He had to quit his job because his office was located in the building right next to the little café where he was meeting his fiancée for lunch the day she died. The few times he attempted to return to work was unbearable for him. He has since avoided that entire area of town. Normally an outgoing, fun-loving guy, Mike has become increasingly withdrawn, "jumpy," and irritable since his fiancé's death. He's stopped working out, playing his guitar, or playing basketball with his friends - all activities he once really enjoyed. His parents worry about how detached and emotionally flat he has become.