Paris
Nobody, actually. Paris only approaches Capulet about marrying Juliet in scene 2, which is halfway through Act One.
Her father is trying to force her to marry Paris when she is already married to Romeo.
No one, but he was gonna marry juliet.
Romeo isn't destined to marry anyone. He does fall in love with Juliet. Juliet is the one that is destined to marry Paris.
In Act 2 of Romeo and Juliet, Romeo and Juliet profess their love for one another and agree to be married, Friar Laurence agrees to marry them in secret, and Tybalt challenges Romeo to a duel.
romeo is upset at the beginning of act one because the girl who he is in "love" with doesn't love him back. & Juliet is upset at the end of act one because she didn't know romeo was who he was at the party.
Unfortunately, no. There was also the County Paris.
marketplace, verona
Yes, the events of act one take place in one day.
Anyone but Romeo one would presume, but in fact the Capulets have their eyes on a rich young man called Paris who is related to the Prince, and who they really want to marry Juliet.
The father, because he is the one who had organised the marriage at first between Paris and Juliet, he makes the desicions in the Capulet household and he is the person who moves the date of the wedding one day earlier. He is also forcing Juliet to be married because in one of the scenes Juliet disagrees in marrying Paris and Lord Capulet says that if she were not to marry him he will disown her. So he also threatens her to marry Paris.