How sweet
Used to pretend that your being nice, or feeling flattered when actually it is just a sarcastic retort.
Kind person: "You make me smile so much"
Sarcastic person: "Awww how sweet"
Sarcastic person: "Awww how sweet"
How Sweet It Is
A shortened phrase for "How sweet it is to be loved by you"
My wife cooks me dinner every night and always looks her best around me, "how sweet it is"