( especially BrE ) to feel very unhappy, especially because you want sb/sth you cannot have
EAT YOUR HEART OUT (FOR SB/STH)
Meaning of EAT YOUR HEART OUT (FOR SB/STH) in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005