He asks the Friar to marry them. Though the Friar is surprised that Romeo has forgotten Rosaline so quickly, he is nonetheless delighted, because Romeo and Juliet's union presents an opportunity to quell the raging feud between the Montagues and Capulets.
I think the sentence that best supports this is "I will advise you and direct you. I should not be a man if this womanly helplessness did not just give you a double attractiveness in my eyes."
