Throughout the series, Kyoya demonstrates his concern and support for Haruhi. He provides her with advice, helps her with her studies, and even protects her from danger. While he may not be as demonstrative as other characters, his actions show that he does have feelings for Haruhi.
In one instance, Kyoya is seen blushing when Haruhi is complimented by another boy. This suggests that he may have romantic feelings for her, but is too shy or reserved to express them openly.
Ultimately, whether or not Kyoya likes Haruhi in the same way that she likes him is a matter of interpretation. The series does not provide a clear answer, but there is enough evidence to suggest that he does care for her deeply.