I don't know how old she is supposed to be in the film, but she's young. Just watched the scene where she had to attend the benefit because Emily was sick so Miranda wanted both assistants. Andy is late home for her boyfriends birthday, as in she missed it.
On paper it looks awful.. girlfriend puts work first and missed boyfriends birthday. However... he knows why she is doing the job, to progress to do what she really wants to do in the future which means in the mean time, she needs to suck it up and do as she's told in the job she has. Let's face it, any job we really want in the future usually involves much of what we don't want to be doing for a period of time.
Anyway, I just hate the scene where she arrives home feeling guilty as anything, after turning down an invite to meet people whom might be important to her ongoing career, to Nate, who is sat there having stayed up until she got home, to look at her, make her feel even more guilty and just say "I'm going to bed.."
If that were my young dd I'd be encouraging her to do what she needs to do to further her career and reach for the stars. Not be made to feel guilty by a boyfriend who isn't happy for her to be going forwards.
I'm glad Andy and Nate didn't get back together in the end.