Act 3 Scene 1

 Romeo says,
Tybalt, the reason that I have to love thee 
Doth much excuse the appertaining rage
• To such a greeting. Villain am I none.
• Therefore farewell; I see thou knowest

me not. This shows that because of the love that romeo has for Juliet he would give up fighting with Tybalt. Romeo and Juliet are getting married meaning that Tybalt is family's with romeo even though he does not know that.