Whatever your romance novel is about and whatever the names and misunderstandings of your protagonists, one thing is clear from the outset: Your story needs to have a happy ending.
So think about this when you pass a bridal shop or see the picture of a beautiful wedding dress, or even a bride on her wedding day. Without a happy ever after, your romance novel isn't a romance novel. It may be a drama with love as the central theme; it may be an action story or a historical with love, but a proper romance novel it isn't.
Give your two main characters the chance they deserve: their own special happy ending!