Answer:
Romeo and Juliet's relationship is indeed a toxic relationship, although they have shown romantic views that purposely covers up the bad parts of their relationship by a cute and lovely view to make the audience believe that this is sad love story. The reason it's a toxic relationship is because Shakespeare presents at the end of the play, how they both died for each other, this is humane and disturbing view of obsession and craving of desperate love, they are addictive to see each other constantly and be together so they slowly become obsessed over each other because they can't have what they want.