The key bag at the graduation party alternates in fullness throughout the evening. When it is handed to Lloyd at the beginning of the night, it appears full, and in subsequent shots (which show Lloyd collecting keys) the bag goes from appearing nearly empty to its eventual (and initial) state of being filled. See more
Man, all you gotta do is find a girl that looks just like her, nail her, and then dump her, man. Get her of your mind.
Your only mistake is that you didn't dump her first. Diane Court is a show pony. You need a stallion, my friend. Walk with us and you walk tall.