In Act I, Scene 2, Lines 1-19, Paris asks Lord Capulet what he says to his suit, which means his asking him for Juliet's hand in marriage.
Paris makes his intentions known in Act III, Scene IV, lines 1-20. This scene takes place between Lord Capulet and Paris. Juliet is treated as a commodity, traded at the whim of her father. In lines 8-10, Paris says, "These times fo woe afford no time to woo./Madam, good night. Commend me to your daughter." Paris is saying that due to the recent death of Tybault and the subsequent unrest, there is "no time" to properly court Juliet (of course, he is more concerned with the affections of Romeo). He asks to be taken immediately to Juliet. Lord Capulet replies, "Sir Paris, I will make a desperate tender/Of my child's love. I think she will be rul'd/In all respects by me; nay, more I doubt it not." The deal is done, he claims. He has no reason to think that a woman, and his daughter at that, will disobey.
I can give you the location easily enough, but not the page numbers. (We don't have the same version of the play.) Look in Act I, near the start of scene 2. The first time Paris speaks in that scene he asks if Capulet has thought about his suit, and his next speech implies he wants to marry her. Later, when Capulet agrees to let him marry Juliet, he seems happy (and wishes that it was his marriage day) so that's another indication.
The very first time that it shows that he wants to marry her is in Act 1 scene ii and Paris and Capulet was talking about it and Capulet was like in two more summers he will make Juliet a bride.