Responses

well, ummmm there is this well known religious-connoted meaning to number 7, like in several religions, but yeah XDD i doubt that's what he meant lol (⌒▽⌒)
Also, if the number 7 is sacred it can also mean stuff like spiritual awareness, emotions and feelings etc. omg but since this is chinese i don't think that's the thing XDD
I'd choose the reversed L theory I guess (づ ̄ ³ ̄)づ
he gave him number 7, saying that he'd "understand" it. does number 7 have any special meaning when in regards to love? or is it that if it's backwards, it's an L and L = love?