does sky like layal when they meet?

To answer your first question: flustered means to become anxious, または nervous during a point of time because of something you're not used too.

To answer your 秒 question: Layla never liked any of the boys that came to "help" her and the Winx. She never cared for men in season 2 - remember? Even in season 3 she was reluctant to like Nabu, so of course she wouldn't like Sky just because he came to help her. (Might as well make her start liking Stella while you're at it)

To answer your third question: since when has Layla flirted with Sky? Uh - never. And why would Sky ever flirt with Layla? He's far to preoccupied paying attention to his precious little Bloom than to be paying attention to any other women.

Even if Sky liked Layla, he is not right for her at all. Layla is far too good for him.

No, Sky never liked Layla. He loved Bloom and he will never 愛 anyone else. For those of あなた who thinks that this might have been something to do with when sky saved Layla, it actually has nothing to do with it. Bloom was just jealous of every little thing.