Relationship can mean different things for different people. I think my relationship with Dan was ideal simply because it relied more on Love as an emotion rather than Love as an action. I think I'd literally live without sex for the rest of my life if it meant I could be with Dan for the rest of my life. A relationship doesn't have rules or requirements in my opinion.
In fact, I once knew a couple who loved each other, and considered themselves to be together, had a relationship, but both fucked freely. They fucked other people more often than each other, the both of them. They had a mutual understanding but there was also love. That was just as much a relationship as Dan and I were, or any other variant.
I honestly think "normal" relationships are rarer than we think. Everyone I know is in an odd relationship. The whole "man and woman meet, fall in love, have sex with each other, and only each other, marry, have family, and die" is boring if you ask me. I'd hate to just have a bleh husband with some bleh love and some bleh sex and call that happy.