hehe...don't worry just balance your time between study and leisure time ^_^....what's really tiring is taking on duty while taking up lectures at school...in my student nurse life, i spent 8 hours/day in the hospital having duty under my clinical instructor (for 3 days) and then take up lectures at school for the next 2 days in the week...wew!
It would be really good to make friends with your fellow nursemates ^_^ as you can relate to each other and of course you can just find time to connect with your old friends as well!
In my experience, the nursing course is a bit hard but more tiring for me coz of the duties I spent in my entire degree, wew! But nevertheless, when you happened to see a patient smile and thank you for your care, it's all worth it! :)