Does this have the same meaning(s) in Italian as en English? I mean especially the meaning which seems most natural for the English sentence, i.e., "if he leaves, I leave" ?
"4. NORTH AMERICAN informal abandon or suddenly withdraw from a job or commitment. "he was in place as the male lead but walked at the eleventh hour" be released from suspicion or from a charge. "had any of the others come clean during the trial, he might have walked""
No, in Italian 'se' can mean two different things - either 'if' or the reflexive pronoun, you have to figure it out from the context