It's nice and all that Yoshida remembers what Tomoko said to her and is thinking about that roadtrip, but ending that trip she'll do what?
Not that people absolutely needs to go to an university, she may do very well while still being so easy going...
Anyway, Mako may overdo about being "a good friend" some times (with Minami), but still is very nice to have such a good friend like her.