Romeo and Juliet

Dear best buddy,
So in school, I've been assigned to read Romeo and Juliet by William Shakespeare. It's amazing how complex, and interesting this book is. William Shakespeare's sonnet method (where he has 10 syllables in a line) works beautifully, and flows with the story, and yet it makes sense.
What I realized is that Shakespeare uses a lot of puns and metaphors in the play/script. Like on page 13, heartless hinds means cowardly servants. But on line 67-68 Tybalt says "What, art thou drawn among these heartless hinds?
Turn thee, Benvolio; look upon thy death" .
This play is so far about Two families ( the Montagues and the Capulets). We haven't met Juliet, but we have witnessed the hate between the two families. There is Romeo Montague, who is currently in love, but depressed because its not the women he is arranged to marry. The way Shakespeare made Romeo sound all charming and so passionate. It's really cute even though the story doesn't have a happy ending.
A question that I has about this play, is what inspired Shakespeare to write this story? Usually when you think of Romeo and Juliet, you think of this really romantic and heart warming story, when really, it's just a story about a couple, that died because of their parents hate. It's cute and shows how much they wanted to e together, but it's so depressing and upsetting really.