What He Had To Do.
As they gazed into each other's eyes, they understood. They understood everything. As many flings as Romeo had, none of them were serious enough for them to stop their relationship. As many drunken orgies he had gotten himself into along with Mercutio, they were all pointless ties, something that would never reoccur. As much as Mercutio mocked Romeo and others for being 'love'- sick, he was deeply, though not hopelessly, in love himself. As many times that Romeo had 'fallen in love' with a random bitch he saw in the street or a ball, he always came back to Mercutio – for comfort and more. But as Mercutio came to realize, this time it will be different. He had forgotten all about him, and would do anything for the wench.
As many passionate nights they've spent together, he had always been drawn towards other people, women especially. As many times they have entered the battle of wits, he had always looked into someone else's eyes and wondered if it would be different with them... as many times that he had followed his random attractions, he couldn't resist came back to Mercutio – for no one could replace him in his heart. Romeo couldn't resist... until he met her. Mercutio looked at the succumbing figure of Romeo standing near Tybalt. He looked into his eyes and understood what he had to do. "O calm, dishonorable, vile submission! Alla stoccata carried it away!" For though he understood that he could never had him again, Mercutio realized that he could not let Romeo suffer under the pressure of Tybalt's attacks. He realized that he would probably regret this later and it was none of his business, but... "Tybalt, you ratcatcher, will you walk?"