No. I might stare longer than usual but I end up rolling my eyes at the end cuz I get annoyed at myself for being attracted to generic attractiveness.
Yes, this, but for me I roll my eyes because I always force myself to find something stupid about them and I usually do (stupid shoes, hair, the way they talk or sound)..... I do it so I wouldn't feel bad about them leaving without me.
I would only blush if I embarrassed myself in front of said person. That being said, if the hot guy tried talking to me I would probably be more inclined to be dismissive towards him because I would progressively become more awkward as the conversation continued