Oh Sinta, the way you deconstructed Orihime's jealousy towards Rukia was so awesome
It put everything into context and illustrates where Orihime's feelings of jealousy are rooted. Really, this issue about questioning Orihime's jealousy towards Rukia has increasingly become a point of frustration for me, as some people are quick to point out how astute Orihime is at understanding Ichigo but at the same time will dismiss her feelings of jealousy towards Rukia as baseless.
As I've said in this thread before, Orihime has often been used as a tool for Kubo to express Ichigo's thoughts and feelings instead of having Ichigo say things himself. Ichigo is a rather non-verbal, socially-awkward person who does not always say what's on his mind. Recognizing that Orihime understands Ichigo very well, she gives us insight into what Ichigo is thinking when it would be out of character for Ichigo to express his thoughts and feelings outright.
So she tells us how important Rukia is to Ichigo, how special she is to him, that she's more than just a friend, more than a comrade to him- the implications, that Ichigo may feel something more than platonic for Rukia, are there. They are there when she corrects Ishida about who Rukia is to Ichigo, and they are there when she tearfully confesses that she's jealous of Rukia's relationship Ichigo. Consequently, given that we know the nature of Orihime's feelings towards Ichigo, one could logically infer from her jealousy that Ichigo may harbour more than platonic feelings towards Rukia.
Of course, there
could be completely non-romantic implications from her jealousy, but there
is a legitimate argument in that would she be as upset as she was if she understood Ichigo's feelings to be strictly platonic? Again, I'm still cautious when it comes to saying that Ichigo undoubtedly has romantic feelings for Rukia, it's not a totally sure thing so far as I'm concerned, but one could certainly come to that conclusion rationally, and Orihime's understanding of Ichigo has certainly helped to push this conclusion.