I found an old acquaintance in the library

When I went to the library in my university, I found a woman whom I've known since I participated in the same class with her in 2008. Though she has already been qualified to be a nurse, she entered the university by the examination for members of society.
So, she is older than me by 9 years. In spite of the age gap between us, it is easier for me to communicate with her.
As is often the case with me, I tend to be in good terms with females older than me.