Friar Laurence has a fatherly concern for Romeo and Juliet. He wants nothing but happiness for the love-struck couple. He knows that the Montagues and Capulets will frown on this illicit relationship, but he accommodates it anyway, as he genuinely believes that only the power of love could possibly end this long, bitter feud between the warring families.
As for Romeo, he's become instantly smitten with Juliet and wants nothing more than to be with her. To Mercutio and Benvolio, this is just another of their friend's romantic infatuations. But Romeo knows different. He knows in his heart that his love for Juliet is the real thing.
Juliet is on the same wavelength as Romeo. She's head-over-heels in love with him, yet at the same time shows a greater awareness of the potential dangers involved in their clandestine relationship. Try as she might, she cannot forget that Romeo, as a Montague, is supposed to be her sworn enemy. But, like Romeo, she follows the dictates of her heart and commits herself body and soul to this all-consuming love.