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I second everyone else ... since when does a girlfriend start dictating that kind of stuff?
And actually in THIS particular situation you may have been safer on a sport bike because they typically stop and turn quicker, which MAY have saved your ass had you done everything right.
Another point, it may not have been your fault, but it really doesn't matter. Get it in your head right now that you are going to spend every second on your next bike avoiding people's screw ups because at the end of the day its YOU getting the shit end of the stick regardless of fault.