Plato's "Symposium" is a profound, witty, poetic, dramatic, and at times very funny exploration of the nature of love. At a party, a number of lively individuals describe what love really "is" (as they see it.) Then Socrates tells of what he had learned on this subject, recounting the teaching of a lady called Diotima. Finally, the drunken gate-crasher Alcibiades bursts in, and praises Socrates himself as the object of love. You will need the Penguin Classics translation by Christopher Gill. We will read the book together. I shall provide a running philosophical commentary and facilitate discussion.
We will also read (and consider) C. S. Lewis' masterpiece "The Four Loves", an exploration of how having four different words for "love" (as Greek has) helps reduce the confusion which English-speakers fall into, with just the one word. You will need a copy of this book, too.