It is hard for me to imagine what I would be doing today if I in love, at the age of seven, with the library in my hometown. A) wouldn't have fallen B) had not fallen C) should fall D) were to fall E) could fallen

It is hard for me to imagine what I would be doing today if I _B) had not fallen_ in love, at the age of seven, with the library in my hometown.

A) wouldn't have fallen B) had not fallen C) should fall D) were to fall E) could fallen