I'm guessing you mean this excerpt:
"If music be the food of love, play on, Give me excess of it; that, surfeiting, The appetite may sicken and so die.— That strain again;—it had a dying fall; O, it came o'er my ear like the sweet south, That breathes upon a bank of violets, Stealing and giving odour.—Enough; no more; 'Tis not so sweet now as it was before."
If so, then after you read the excerpt you will find that Duke Orsino was in love with love itself.
