Sentence 1: Bill wanted to ask out John but Bill was shy. 
 Sentence 3: Bill was happy that John asked him out and so he agreed 
 Sentence 4:  Bill and John went on their first date and it was fantastic 
 Sentence 5:  Bill and John decided to get married a year later 
 Option 1: John was dating someone else, so he couldn't go out with Bill anyway. 
 Option 2: John knew that Bill liked him so he asked him out instead.