I cheated on my boyfriend before we got engaged, and now I'm guilty and shameful. I don't want to tell him because if I do, then I'm pushing my guilt and shame on him. He tells me I make him the happiest he's ever been, and I've never been happier in my life. I want to stay with him, and he's the best thing I've ever had. How do I overcome my guilt and shame and begin to mce on I my life and our life, as we continue with our new engagement.