"Romeo & Juliet" by William Shakespeare. How does Romeo change throughout the play?

In the beginning of the play Romeo appears to be somewhat pretentious. He speaks dramatically of his "love" for Rosaline which, in fact, is probably not love at all. He speaks in rhyming couplets which makes his words sound insincere and rehearsed. He over dramatises the situation while talking to Benvolio (his cousin) which suggests that he is seeking sympathy or attention - such actions make him seem immature in comparison to the rational thinking …

…it has had on him but his actions have the opposite effect by making him seem childish. Romeo does however have positive qualities too. He proves himself hugely loyal when he kills Tybalt in revenge for the death of Mercutio. Furthermore he proves his dedication to Juliet when he kills himself thinking she was dead. Both these actions could however be interpreted as out of proportion to the situation, again demonstrating Romeo's tendency to over-dramatise.