What are Juliet's emotions in Act III, Sc. 5 of Romeo and Juliet?I have already come up with immature, selfish/ stubborn, betrayed/ alone.

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.