Pardon, good Mercutio, my business was great, and in such a case as mine a man may stain courtesy
Good morrow to you both. What counterfeit did I give you
Romeo is criticized by Friar Lawrence fort not really loving Juliet at all, and only supposedly loving her because of her looks. He thinks He should be with Rosaline, because that was actual love, and they would be together till death. Where as he and Juliet will not last together.
Rosaline was not Romeos ture love, and she was very cruel to him, but now that he has Juliet people are concerned that she is not his love. Romeos aclaimed love for Juliet has cause lots of controversy with the two rival families. He is expected to receive a letter challenging him to a duel because of his love with Juliet.
Romeo blew off Mercutio and Benvolio because his business was more important somewhere else. This is clearly a very rude thing to do and say, so they briefly argue about his actions. Mercutio claims that Romeo played him as a fool, by abandoning him and Benvolio.