Julie told the police about the engagement and Jeremy admitted to it though naturally he didn't admit to telling Julie he was breaking off the engagement because he wanted to spite his parents because admitting he was out to spite them would not look very good...
I thought, after he'd broken the news to his parents, he came back and said he'd changed his mind because his parents had approved. Whether this meant they approved his choice of bride, his decision OR made noises about it being high time he stopped living in sin isn't clear. What is clear is that it was the closest Julie came to getting his ring on her finger.