psychopath
ˈsʌɪkəpaθ/
noun
a person suffering from chronic mental disorder with abnormal or violent social behaviour.
synonyms: madman/madwoman, mad person, deranged person, maniac, lunatic, psychotic, sociopath
in·fat·u·a·tion (inˌfaCHəˈwāSH(ə)n)
noun
an intense but short-lived passion or admiration for someone or something.
"he had developed an infatuation with the boy"
{based off the song A Sky Full of Stars by Coldplay}