So recently, my PI submitted a paper that I and another graduate student have worked on for the past year. The graduate student and I contributed equally on this project, in creating figures, getting data, writing the manuscript, etc., and he agrees as well. However, the first authorship is going to my partner, but I think it would be more fair if we had co-first authorship.
I want to bring this up and ask my PI, but I'm not sure what she'll say. How should I explain my situation to her?