Can my high protein, asparagus dense meal plan be the cause of my smelly urine?

Asparagus likely. Asparagus contains an aromatic compound converted by the body of those with the proper genetics into a volatile, and quite strongly smelled compound secreted in the urine. A high protein diet might increase the urine concentration but will probably not add anything to the urine which has an odor. The asparagus diet is not harmful to your heath so you can continue chomping away.