Romeo and Juliet are actually not in love. Shakespearean time was between the middle Ages and the Industrial Revolution and it was branded by religious changes.
Eventually, marrying Romeo would detain her from getting married to Paris and being miserable from marrying a man she was not interested in.
It must also be noted that speeches about graves, deathbeds, dying for love, and so on are made by the characters on any occasion, every now and then. But is it even all that great.
There is no doubt that "Romeo and Juliet" is a play that has stood the test of time but people think of it as a pure love story. I agree that some love is romantic but some isn't.
In Shakespeare's play, the power of hate between two families, the Capulets and Monatgues, causes the tragic deaths of Romeo and Juliet their children.