Before you is an invitation to introduce you to Erich Fromm's magnificent The Art of Loving: An enquiry into the nature of love. There may be parts of this book with which you fervently agree, and others where you vehemently do not. In either case, you will not regret the time you spent reading it. The pleasure you gain from its reading and the impact of the book on your life will be immeasurable.
You can talk or argue about Fromm's The Art of Loving, but, for our part, we have limited ourselves to a few short remarks on the rationality (or irrationality) of that phenomenon called love.