This weekend is the weekend for silly chronicles from extremely daft ladies.
Tell him you can't go on with the wedding because you're heart isn't in it anymore. Simple. Whatever happens you'll have to pay the piper. My fear is that your prince charming may not give you that fairytale ending you're looking for because your character and priorities are highly dubious.
By the way when did "yahoo - yahoo" become an acceptable occupation? Greedy lot.