word choice - What can I call other students if I am also a student?

You might consider cohort:

An assistant, colleague, accomplice.

or

A company, band; esp. of persons united in defence of a common cause.

If you wanted a word that expresses solidarity as students, this might be a good choice. When I was in grad school, we used it to refer to those of us who matriculated the same year; it provided a nice sense of unity in the face of adversity (a heavy workload!).