What is the realtionship between Romeo and Juliet as opposed to the relationship between Romeo and Roseline?
In Shakespeare's Romeo and Juliet, the significance of the first relationship we see in the play that involves Romeo is that he is totally infatuated with Rosaline. He is sad, and in love yet out of love--out in the sense that Rosaline will not have him. He declares to his friend:
Love is a smoke raised with the fume of sighs;
Being purged, a fire sparkling in lovers' eyes;
Being vexed, a sea nourished with lovers' tears.
What is it else? A madness most discreet,
A choking gall, and a preserving sweet. (Act I:i)
Romeo is a mixed-up adolescent who's just been refused.
Benvolio tells him, however, that he can get over this:
By giving liberty unto thine eyes.
Examine other beauties.
And that is what he does. Romeo sees Juliet, and Rosaline is quickly forgotten. The complete infatuation that was directed toward Rosaline is redirected toward Juliet. The rest, as they say, is history.
Romeo is rejected by Rosaline but loved deeply by Juliet.
I am not sure I understand this question. The way it looks, all you are asking is what relationship Romeo has with Juliet on the one hand and what relationship he has with Rosaline on the other.
Romeo essentially has no relationship with Rosaline. He is infatuated with her, but we have no evidence that she would say that they have a relationship.
Romeo and Juliet, on the other hand, end up very much in love. They get to be so in love that they end up getting married secretly.
Is this really what you're asking? Feel free to clarify...