Dream of girlfriend, swim

I am swimming underwater pursuing my best friend, who is gunning for bottom. I can breathe underwater, but I cannot speak underwater, nor tell my friend to try breathing underwater. He goes to an underwater cavern inside some kind of cemetery chapel. I surface there unnoticed while he and my girlfriend confer conspiratorially. I leave lest they discover me. As I swim toward the surface, no longer able to breathe underwater, I cry, filling the lake with tears so rapidly that I will never outrun the rising surface.