One of the concepts I'm exploring in my new book is whether a relationship can have both intensity and longevity. We all love the rush of those passionate first few months of a relationship (or if we haven't experienced that intensity yet, we can imagine how awesome it is). But as anyone who's been in a long-term relationship knows, that initial euphoria fades away after a while. I've been wondering if it's possible to have an intense relationship that remains just as intense past those first