Are you currently in a relationship?
If so, how long?
How old are the two of you?
Are you male or female?
I was confused becuase you said "he" in the initial question or was it her that posted?
Ok, I got it now. :)
As I said in the other question, dreaming of a bridge symbolizes a transition from one state of another. It could be a state of being or a real physical move from one state to another. If you've been talking about making a move, either physically or emotionally, this would be indicative of that or the fact that there may be a change coming up that you may not be aware of and your dream is letting you know that.
The crash into the water speaks of a subconscious worry that whatever move this is might not be the right decision. It's common to have doubt in any instance of change or when we go in a direction we've never gone before.
Water in a dream is symbolic of emotions. Do you feel as if you are "drowning" in your love sometimes? Do you feel overwhelmed by your emotions? To hold on to the one you love, even in impending death is almost self explanatory a willingness to go through thick and thin for your love or something you believe in.
Death never means death in a dream. Death in dreams means transition or rebirth. Between the bridge and death, it seems you're destined for some type of change soon. Chase