I am going to make the call that you are referring to the point where Juliet’s parents enter her room and tell her of the decision they have made to marry the suitor Paris. There are many emotions going on in this part of the scene between parent and child. I guess I would have to diverge with you a bit on some of the adjectives you use to describe her emotion. I agree on the “betrayed” or “alone.” Yet, it is in this scene where Juliet feels, rightly or not, that she is a woman, no longer a girls. It is in this scene where she feels she is able to participate in a decision that will impact the rest of her life. When she says that Paris will not make her a “joyful bride,” it is a statement that indicates how she is no longer going to be a submissive child, especially when it comes to the issue of how she is to spend the rest of her life. I think that she shows herself to be independent, one adjective that reflects the change from child to woman. I think that she also shows herself to be quite driven in her actions, as she does not acquiesce to the verbal abuse of both of her parents. She is also resolved in her commitment to marry Romeo, regardless of what her parents think, feel, and do. Finally, I would say that Juliet is also zealous in her love of Romeo at this point because it not only represents her embrace of her future with him but it also shows her drive to flee her past, her name, into an uncertain unknown. Perhaps, we can also say that this represents her youth, and what it means to be young and in love.
Prior to her parents telling her that the wedding has been moved up a day, Juliet is extremely despondent. She has just spent the night for the first time with Romeo and now, he must leave because he has been banished for Tybalt's death. This was their first time together and she doesn't know if she'll ever see him again.In fact, there is heavy foreshadowing in this scene before Romeo leaves. Romeo and Juliet's death are heavily foreshadowed before Romeo leaves. Juliet says to Romeo: "Methinks I see thee, now thou so low,/As one dead in the bottom of a tomb."
Secondly, since her parents think Juliet has been cyring over Tybalt's death, they move up the wedding a day to "cheer her up". Of course, this sends Juliet over the edge. She defies her father for the first time telling him that she won't marry Paris. This shocks her father because she's usually an obedient daughter. However, she is desperate. She is so desperate to get out of the arranged marriage to Paris that in the next act, she fakes her death.
Confused, Angry, upset
Juliet would be very confused as she had just spent the night with Romeo and it is clear that thery have fallen in love, that same morning her father comes into her room and demands her to marry Paris. also the man she has fallen in love with has killed her close relative, causing a very mixed emotion, confusion.
she would be angry because her father had threatened to disown her if she does not marry Paris, this makes it even more clear why she can't be with Romeo.
she would also be upset with all of the above, including she is still greiving the death of Tybalt. she would also be scared and fearful of romeo's saftey.
good luck :)