I'm amazed Haruhi even notices Kyon at times, I don't think she'd lift a finger if another girl looked at him. Remember the trip into town in the early eps. when they were split into groups. Though Yuki showing any emotion like that...unlikely, must of been Mikuru.
comment #9621 I don't think we're watching the same anime. A) Haruhi was consistently upset when Kyon went with one of the other girls during the group-split episode you mentioned. B) Haruhi put her coat on him. C) Haruhi walked home under his umbrella. D) Haruhi created the fall off the cliff. E) Kyon was Haruhi's first friend. F) Childhood promise (Inferred from op, and mention of that festival) G) She asks for Kyon's approval often. H) How pissed off she got during the baseball episode. Glared at Kyon during the ponytail, almost destroyed the world when he defends Mikuru for striking out.
Or read the novels, the first one alone (which has been translated by fans) makes it abundantly clear that Haruhi really likes Kyon very much, no matter how she may try to hide it. :) You can find the novel translation here: ttp://www.baka-tsuki.net/project/index.php?title=Suzumiya_Haruhi