Romeo and Juliet: Comedy or Tragedy?

In class, we have been reading Romeo and Juliet and debating whether it was a comedy or tragedy. Before reading this I would have said it was definitely a tragedy. All I knew was that they fall in love but it was forbidden so they killed themselves. Tragedy, right? Well we looked into it farther...

Yes, whenever a character dies it is most likely a tragedy. But the parts leading up to it is what we're looking at. First of all, just the fact that they have known each other for a matter of a few hours is reason enough. They cannot be truly in love. Which leads us to think it is more lust than love. Instantly, when Romeo lays eyes on Juliet he completely forgets about Rosalin and switches love interests. I think that is when Romeo feels he is in love. He has not said a word to Juliet, yet he knows that is what love is. The same with Juliet during the balcony scene, act 2 scene 2. When he breaks into the Capulet's garden to see Juliet, instead of being a little creeped out like most would be, she is delighted! She declares her love for him even though she has said practically nothing to him and she wants to get married tomorrow. I think this may be a wanting to disobey her parents in a way as well as lust. Either way, I think this part is mostly comedy because in a way I think the play may be mocking teenage love and there is no way someone can fall in love that quickly.