Help to write a paragraph telling my boyfriend that “i promise I’m at my sister’s place, I would never do you dirty “

Hey love, I just wanted to reassure you that I am at my sister's place and would never do anything to hurt you. I promise that I am completely faithful and devoted to you. Trust is so important to me and I would never betray that. You mean everything to me and I would never do anything to jeopardize our relationship. I love you more than words can express.