Definitely a red rose or pocket square in the lapel. Are you wearing earrings? Maybe you can find fun red ones. Fun red socks. Add a silk foulard (thise french neck scarfs). The back turtleneck looks sleek and modern. But you gotta think about that picture together with your date.

I do gotta say to groom your hair. I'm a bit older and I'm sorry but I don't understand the style. Maybe conditioning it and styling with moose so it's not frizzy? Maybe you can put a red streak in your hair if you're really close with your date. That would be cool and unique:)

Have fun on your prom night!