i really hate when characters use "he doesnt know you as well as i do" because no duh. they just started dating. you learn that over time not right off the bat. did you just magically absorb all the knowledge of his likes and dislikes as soon as you met/started dating? no you didnt so get your high horse and shut up.
the fact i was so into the story and invested in the characters makes the rushed ending so much more painful :(