Depending on who the "someone" is, this dream might not be at all significant. On a symbolic level, the someone represents yourself, suggesting that this is only a wish-fulfillment dream illustrating your own hope of being married.
nahi pata
your boyfriend or longterm mate will propose soon. Have a nice Wedding!
This is a very common dream, but it does not predict your future. Instead, it expresses the desire for marriage that you feel now.
He wants to be your date
That would depend entirely on the context of the dream.
It was probably from a dream you couldn't remember. If you are sure you didn't dream about anything, then sleep-talking is always possible.
Having a dream that your best friend is getting married and you get to plan the wedding is a good dream. It probably doesn't mean anything, but it is nice to have good dreams instead of nightmares.
A dream date would be if you were with the person you wanted to be with the most and end up having the best time ever.
The dream is about yourself, and you are the person who feels AS IF there hands have been cut off. This is a metaphor, illustrating your feeling of being made helpless and ineffectual.
Dreams communicate through symbols and metaphors, and dreams are about the dreamer. So someone else's dream about you in a wedding gown is NOT really about you. The wedding gown and long hallway mean something to the dreamer. The dream used your image to represent the dreamer herself, or some aspect of herself that you represent.
The dream only means that there is something going on in your life and you feel unprepared for whatever it is that you are expected to do.
If the dream girl is the image of someone you like, or perhaps a delightful imaginary person, the dream is wish-fulfillment. It not only expresses your own desire, but provides the experience of achieving that desire while in the non-threatening context of sleep. The dream does not express anyone's thoughts or feelings other than your own.