Everything written below is written in a truly friendly manner, and with the sole intent to help you with a different POV and another set of eyes...and some honesty too.
Of course I expect we all see things differently. So, if the image you posted is exactly what you like, I encourage you to follow your own taste and please yourself. However, sometimes it is good to know what others think of our work, and it may be difficult to get beyond the easy "I like it" comments to find someone who is willing to say differently in a constructive manner.
I know that some people don't share my taste (in my own work) and that is OK with me. I produce what I like and find people (clients) who like my style or work.
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She is pretty. That always helps a photo.
In this image there were three things I did not like:
1. The high POV
2. The processing (turns their face into odd tones, darkening the mid-tones it appears)
It screams "gatsby" to me. I love his tough guy look, the desaturation as opposed to just sepia or straight black and white. Also LOVE seeing the truck as a background instead of sky. Looks like Chicago to me! Great models, too.
Personally I really like it.
I like the high angle with truck in background, photo treatment is great, love the sun flare (sun reflection from the truck) under / behind her right arm
Great shot
But having him with his face turned toward her, chin down, and maybe running the back of his hand down her arm or something would have really made this a true "period piece" if you will.
Then again, maybe that's too sexy for high school prom.
It's very Madonna-Warren Beatty's "Dick Tracy" style. I like it a lot. Where did you ever find a '50 Chevy panel? If I had one recommendation, it'd have been that a boat-tailed Auburn, or '37 Cord would have fit the bill perfectly. I s'pose trying to find either of those in your neighborhood may have been problematic?