True love exists, but it is extremely rare, rarer than many people would give it credit for. It is often mistaken with lust or infatuation. I would go so far as to say that the majority of us will NEVER experience true romantic love in our lives.
The platonic love between family members, however, is actually quite common.
Romantic love is one of the great things in this world, but it is not absolutely necessary, and indeed, most of us go through life never finding it. I myself am committed to my career and my own life - I like to travel, I like to work, I like to spend time by myself reading and listening. I don't think I could ever marry someone, simply because it would constrain my lifestyle too much. I want to live my life the way I want to, according to my own values. If I manage to find a woman who so happens to have the exact same values and lifestyle that I have, then great! But I'm not holding out hope that I will ever find someone like that.
Which is sad, and a tad bit depressing. But then I remember that I manipulate the genes of an organism or clone a plasmid and insert it into a cell to make it produce proteins it never would naturally produce, and that makes me feel a whole lot better.