Read the following context and choose the best option to answer the question.
Context: I was never his best friend . I was never his number one , even though he was mine for the majority of my growing - up years . I felt like the backup friend ; the one he hung out with in public only when no one else was available . I know part of it is just exaggerated in my own mind by hurt , that he never meant for me to feel that way , and that I should never have relied on him that much in the first place . But when he left for college I might as well have not even known him .
Question: Why does the narrator no longer know their friend after they left for college ?
Options: 
- Their friend never talks to him
 - Their friend took his girlfriend
 - Their friend gets in a lot of trouble
 - None of the above choices .


Their friend never talks to him