Thank you so much for responding. You make so many great points. I think the lightening was definitely something I was struggling with, which I think can be seen in my shadows.
Your suggestion for maybe sitting the couple on the bench is something I had considered. I decided not to do that because I wanted the couple to be the main focus. I was afraid that if I sat them on the bench, they'd fall to the back. Maybe I can revisit this idea though.
The setting is a music venue so there are a lot of people kind of hanging around, smoking, listening to the music (while some are in the venue listening, it was sort of a garage set up). I wanted to capture that feeling.
I think to really pull this off or to nail it, I need to get the lightening to be solid. It's something I struggle with because light tends to bounce off things and with so many different light sources, like you had said, it can be tough.