be beside yourself

US /bi bɪˈsaɪd jərˈsɛlf/
UK /bi bɪˈsaɪd jərˈsɛlf/
"be beside yourself" picture
1.

essere fuori di sé, essere sconvolto

to be overwhelmed with a strong emotion, such as anger, grief, or excitement, to the point of losing control

:
She was beside herself with grief after losing her pet.
Era fuori di sé dal dolore dopo aver perso il suo animale domestico.
He was beside himself with joy when he heard the good news.
Era fuori di sé dalla gioia quando sentì la buona notizia.