She thought he didn't love her anymore, and she thought she was right.
If there is another way of missing someone in the world, it is to use the answer he/she thinks to determine what he/she is thinking.
Guessing in love makes people blind, it is love that is too deep, love that is too extreme, it is the final suicide, it is not letting yourself go.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.