Benvolio urges tybalt and mercutio to take their fight off the streets because there are people watching and the prince would get them in trouble if he saw them fighting.
It is illegal to fight in the streets; Benvolio is trying to keep the peace and uphold the law. He has already warned Mercutio that a fight was likely if he should run into the Capulets.
He says that Tybalt came after Romeo but Romeo "spoke him fair", so he then went after Mercutio, and killed him when Romeo was trying to restrain him. He says Tybalt then fled, "but by and by comes back to Romeo" whereupon Romeo killed him, Benvolio being unable to prevent it. This is mostly true, although he withholds the fact that Mercutio went out of his way to start a fight with Tybalt, who had no interest in fighting him. What Tybalt would have done to Romeo had Mercutio not been there is a director's call. The play is clear that in fact Tybalt did seek Romeo out after Mercutio's death, so Romeo was acting in self-defence in fighting him. Tybalt re-enters and Benvolio says "Here comes the furious Tybalt back again." In most movie versions, it is Romeo who chases after Tybalt, which would make this part of Benvolio's account of the fight inaccurate also.
When Tybalt and Mercutio fight, romeo trys to defend Mercutio but ends up having him killed. Mercutio dies from Tybalt bringing the sword from under Romeo and stabbing Mercutio.
Tybalt challenges Romeo to a sword fight, which Romeo declines, but Mercutio accepts in Romeo's place. Tybalt wounds Mercutio when Romeo attempts to break up their fight. Mercutio dies and, in a rage, Romeo kills Tybalt. This results in the Prince banishing Romeo for life, only hours after his secret marriage to Juliet.
To them its just a hobby or a sport until it leads to death were Tybalt kills Mercutio and later Romeo kills Tybalt.
Romeo, who Tybalt means to challenge to a fight.
Benvolio (in Act 1), Mercutio and Romeo (in Act 3).
Benvolio informs the Prince that Tybalt killed Mercutio, and in retaliation, Romeo killed Tybalt. He explains that he tried to separate them, but Tybalt provoked the fight leading to the tragic events.
Benvolio isn't more important than Mercutio. Benvolio is a good friend to Romeo (Benvolio sort of means 'well-meaning' in street-Italian), but he doesn't make much difference to the plot. Mercutio picks the fight with Tybalt that turns this from a lovestory into a tragedy. Benvolio tries to joke Romeo out of his pash on Rosaline, tries to persuade Mercutio not to fight Tybalt, tries to get the Duke not to banish Romeo - but nobody ever listens to Mercutio. A nice fellow - but not a lot of use to anybody.
Benvolio tells Mercutio to retire because he senses a brewing confrontation between Mercutio and Tybalt, and wants to avoid any violence. Benvolio is concerned for their safety and tries to diffuse the situation by suggesting they leave.
It is illegal to fight in the streets; Benvolio is trying to keep the peace and uphold the law. He has already warned Mercutio that a fight was likely if he should run into the Capulets.
Benvolio and Mercutio spend a fair bit of time talking to each other. You will need to specify which line you are asking about.
He hangs around with Benvolio, tries to provoke Tybalt into a fight, then actually does get into a fight with Tybalt when Romeo refuses to fight. And in that fight Mercutio dies, and that's the end of him.
Mercutio is looking for a fight anyway. He doesn't like Tybalt and sneers at him, calling him the "Prince of Cats". When Romeo does not respond to Tybalt's insults, Mercutio gets angry on Romeo's behalf, but it wasn't going to take much to get his sword out anyway.
He says that Tybalt came after Romeo but Romeo "spoke him fair", so he then went after Mercutio, and killed him when Romeo was trying to restrain him. He says Tybalt then fled, "but by and by comes back to Romeo" whereupon Romeo killed him, Benvolio being unable to prevent it. This is mostly true, although he withholds the fact that Mercutio went out of his way to start a fight with Tybalt, who had no interest in fighting him. What Tybalt would have done to Romeo had Mercutio not been there is a director's call. The play is clear that in fact Tybalt did seek Romeo out after Mercutio's death, so Romeo was acting in self-defence in fighting him. Tybalt re-enters and Benvolio says "Here comes the furious Tybalt back again." In most movie versions, it is Romeo who chases after Tybalt, which would make this part of Benvolio's account of the fight inaccurate also.
When Tybalt and Mercutio fight, romeo trys to defend Mercutio but ends up having him killed. Mercutio dies from Tybalt bringing the sword from under Romeo and stabbing Mercutio.
Tybalt challenges Romeo to a sword fight, which Romeo declines, but Mercutio accepts in Romeo's place. Tybalt wounds Mercutio when Romeo attempts to break up their fight. Mercutio dies and, in a rage, Romeo kills Tybalt. This results in the Prince banishing Romeo for life, only hours after his secret marriage to Juliet.