Joke: Proposal

Boy: I Love You. You are the most beautiful gal i have ever seen.
Girl: There is a girl behind you who is more beautiful than me.

Boy looked back but no one there.

Girl: I Hate You. If you really love me, you wouldn't have seen back.

Boy: It's OK. But what i should do with this diamond ring now?

Girl: See, I cant joke with my darling?