Evelyn Lozada -- I'm QUITTING 'Basketball Wives'

Sources close to the reality star tell us ... Evelyn feels producers violated her trust by allegedly divulging sensitive information about an illicit relationship she had in the past.

We're told Evelyn believes producers leaked the information to a female cast member in an effort to incite a violent confrontation between the two women on the show.

We're told Evelyn feels completely betrayed and even fired off an email to producers last night ... saying she wants to leave the show for good.