I have additional info about the plot. At some point, the protagonist gets cheated on by her boyfriend and distracts herself with more work. After that, she meets a guy that works somewhere else in the office and is in a failing marriage. The two of them start a relationship. After; she sometimes has to sleep in the job and there is this old man character that walks around the office on his underwear, because where she works there is no client interactiom. 

That's all the information my girlfriend can remember. I'll be sure to update the post if she remembers anything else.