Hull is fine, I am also a 2nd year studying History and I have also lived in the city for 5 years now.
I have had no trouble what so ever and I live in a rough part as well. As a student you will never end up in the bad parts of the city and to be honest the bad parts of Hull are no where near as bad as the bad parts of a really big city like London or Manchester, for example Hull doesn't really have any gun crime or trouble with gangs like other cities do.