Brittany – Of course it has meaning – a lot of meaning. Obviously I cannot give you an exact meaning, so will have to say what I feel your dream is about.
At sixteen you have become more sexually vulnerable and active. This depending on where you live. Also you show a fear of the water by climbing out, another sign of vulnerability. So the attack is a full blown drama of your vulnerable feelings.
So it suggests you are very sensitive to male aggression or even any sexual approach. If there are any classes you could attend or a book to read about assertiveness training. After all, in a dream you could do anything you like. So why let him do all the action. Visualise turning the tables on him and let some feelings flow. Clobber him.
Size does not matter. Read the story of the little woman who terrorized a whole Chinese prison. It is the account of Gladys Aylward: The Little Woman.
Tony