A servingman, Juliet, the Nurse, Benvolio
In Act 1, Scene 1
Tybalt calls Romeo a "villain" in Act 3, Scene 1 of Romeo and Juliet.
The only person Romeo kills is Tybalt.
Romeo is sad in Scene 1 act 1 because he is in love with Rosaline but she doesn't love him back.
act 4 scene 1
Act 1 Scene 5
Your question is a bit vague. Are you talking about Act 2, Scenes 1 and 2? Mercutio in Scene 1 is trying to get Romeo to come out of hiding by talking dirty about Rosaline. This is the sort of joshing locker-room talk that Mercutio is used to engaging in with Romeo. But Romeo won't have any of it. "He jests at scars that never felt a wound." Romeo realizes that, as with most locker-room talk, Mercutio has no idea what her is talking about. Romeo has grown out of that stage.
He doesn't. Mercutio is not in that scene, and Benvolio and Romeo do not part company.
Juliet finds out what happened in Act 3 Scene 1.
to protect romeo
its from romeo and Juliet scene 4 act 1
In Act II Scene 1 Mercutio satirizes Romeo's supposed love for Rosalind.