Diana has been a wreck ever since she got stood up. She went to the location of the restaurant where the date was supposed to take place. Six hours. She waited in the restaurant for complete six hours while drinking only water. She was sure the water she drank will be able to form an ocean.
It's been six days since that fateful day and still, no word form Skylar. She has been depressed ever since that day. She became picky about a lot of things and has severe mood swings.
She visited the office and found out that Clark went out on a business trip and she figured that was what kept Skylar busy as well. She used that to comfort her aching heart and block all pessimistic ideas from weighing her down.