i dun think anybody has  to blame cuz both could work out lit bit if they like each other and really were looking for some +ve solution.For me it sounds like by the time guy was getting engaged, this s the only conversation that took place between them.

GURL:>> i passed my 1st n 2nd year....and runnin 3rd year now....will you marry me?

GUY:>>ohh really? you passed ?? thats kool  i guess....awesome....i am ready to marry wid you honey...lol