he didnt know his was fighting Tybalt because Juliet would of stopped him
Romeo knew that Tybalt wanted to fight him because Tybalt had sent a challenge letter to Romeo's friend Mercutio. Mercutio then informed Romeo that Tybalt was looking for him to seek revenge for crashing the Capulet party.
Tybalt. Juliet's cousin. He also fought Paris.
Tybalt.
At first, Romeo does not want to fight with Tybalt because he is now married to his kinswoman, Juliet. This makes Romeo and Tybalt of the same family, and Romeo does not want to fight his own.
Juliet does not know about all of those things we just saw happen in Act 3 Scene 1: the fight between Tybalt and Mercutio, the fight between Tybalt and Romeo, Tybalt's death, and Romeo's banishment.
Tybalt is a character in "Romeo and Juliet" by William Shakespeare. After Romeo and Juliet are married Tybalt becomes related to Romeo because Tybalt is the nephew of Lady Capulet who is Juliet's cousin.
We never find out exactly what it says, but we know its gist: Tybalt was calling Romeo out for a fight.
Romeo does not want to fight Tybalt because he is Romeo's wife's cousin. But Tybalt does not know this, and neither does anyone else except Juliet, the Nurse and the Friar.
Mercutio is quite happy to fight Tybalt, who he dislikes intensely. Romeo is trying to avoid fighting Tybalt because he is Romeo's wife's cousin (although Tybalt does not know this and in fact never knows it). Mercutio has no such family ties.
Romeo refused to fight Tybalt because he was secretly married to Tybalt's relative Juliet. His friend Mercutio didn't know this and took up Tybalt's challenge instead, thinking Romeo was being a coward and got killed for his trouble.
In the fight between mercuito and Tybalt: Tybalt comes into the court place and mercutio starts egging him on. Pretty soon they start fighting but its not a serious fight. Tybalt is really waiting to kill romeo because he is mad at him for going to the capulets party. Then romeo shows up and he doesnt want to kill Tybalt bc he is now married to Juliet and they are technicaly cousins. Tybalt doesnt know this and he is still fighting mercutio. Then romeo interferes to stop the fight but Tybalt accidentaly stabs mercutio when romeo gets in the way which kills mercutio. Then romeo goes to avenge mercutio and he ends of stabbing Tybalt, who then dies. Then romeo is banished to mantua by the prince.
Romeo tells Tybalt that he loves him before the fight goes down because not even a day before he had wed Juliet. Tybalt being Juliet's cousin would make Tybalt now his family. This is why Romeo says that he loves him. As back then loving your family was important.
Romeo denies Tybalt's challenge to a fight. He does this because he has just been married to Juliet and now sees Tybalt as family although Tybalt doesn't because he does not know nor will he ever know. Romeo tells Tybalt he will not fight because he loves him.
Tybalt calls him a "villain". Normally this would be enough for Romeo to start a fight with him. However, Romeo calmly replies that although Tybalt may not know the reason why Romeo is not going to take offence to that word, it is enough that he knows that the reason exists. He continues, "Villain am I none. I see you know me not."
Romeo certainly conveys the idea that he is not interested in fighting Tybalt. That was the point of his speech and he gets the point across. I don't know how else you could judge effectiveness.