Personally, I’d say : 1. rather go to the (more expensive…) eat in places, not the fast food/hangout spots. 2. Don’t go out and mingle with boys , 3. don’t act loud or dress flashy and 4. Be home before 12.
You should be okay if you follow my advice, and not just because it looks bad, but because it could be bad for your neshuma. Unless you’re looking for an ultra-frum /chasidish shidduch and are pretending to be frummer than you actually are. Good luck!