A disorder in which a person who has experienced a traumatic or life-threatening event experiences symptoms such as psychic numbing, reliving the trauma, sense of detachment from others, loss of interest in familiar activities and increased psychological arousal is called

Post-traumatic stress disorder (PTSD) is an extreme stress response to a traumatic event that threatens your safety or makes you feel helpless. The symptoms of PTSD present as a psychiatric condition that can develop following any traumatic, life-threatening, or highly unsafe, catastrophic life experience.

Explanation:

if your boyfriend is cheating on you, my best advice to you is to dump him, he's only going to drag you down. and if you do, don't fret there's plenty better that know how to treat a person right. i mean honestly, the whole point of a romantic relationship is love, and if you love someone you aren't going to cheat on them. i do believe in second chances, but why would he cheat in the first place? i personally feel that if someone cheats, they ruin any chance they wanted/had with you. i wish you the best of luck with this, hang in there.