Please translate russian?

i've been dating this russian guy. he knows how to speak very little english, but when you are in love that's all that matters. we mostly spoke with showing each other things, or charades. i caught him cheating on me. and i was so angry i started yelling that it was over, and i headed out the door. he immediately ran after me and begged me on his knees crying something in russian. i don't know what it means. i'm so angry at him, but i'm curious to know what he had to say. sounds like . ya ooh- mir zavas! ya sta vleh-cheh