Because Juliet is already married. But Capulet doesn't know that.
Capulet shouldn't rush the marriage of Paris and Juliet because Juliet is still very young and may not be ready for such a commitment. Rushing the marriage could also lead to resentment from Juliet and strain their relationship. It's important to give Juliet time to grow and make her own decisions about marriage.
He wants his daughter to be happy with the marriage agreement.
Count Paris, he is a suitor to Juliet.
Count Paris visits Lord Capulet in Act I, Scene II, of Romeo and Juliet, to ask Lord Capulet for Juliet's hand in marriage. Lord Capulet stalls, telling him to wait until Juliet is older.
Capulet's announcement of Juliet and Paris's marriage is ironic because he made the decision the morning of Juliet's wedding night. Juliet tries to resist the marriage because she is already married to Romeo.
Lady Capulet supports Juliet's marriage o Paris.
A marriage with a character named Paris.
Paris
Capulet wants to discuss Paris's proposal to marry Juliet. Paris has expressed his desire to marry Juliet to Capulet, and Capulet is arranging a meeting to discuss the potential marriage.
Capulet and Paris are discussing Juliet's potential marriage to Paris. Capulet wants Paris to woo Juliet and wait for her to be ready for marriage, while Paris is eager to marry her soon. Ultimately, Capulet agrees to Paris' proposal, setting the stage for the tragic events of the play.
Capulet tells Paris that he needs to win Juliet's heart and consent before they can proceed with the marriage. He advises Paris to woo Juliet and gain her affection before rushing into marriage.
Lady Capulet wants to discuss Juliet's potential marriage to Paris with her in Act 1. She is hoping Juliet will consider Paris as a suitor and agree to the arranged marriage for their family's benefit.
Capulet says this to Paris in Act 1, thinking that he will not approve the marriage of Paris to Juliet unless she agrees. Paris never does woo her and certainly does not get her heart, but Capulet agrees to the marriage anyway, and quickly regrets it.