Would you be nervous?

There are 16 days between now and when my plane departs from Heathrow. After this short time, I will leave home and not return for 12 months.

I havent really thought about it in great detail, therefore I have never really been worried, but it is so close that it is impossible to avoid.

The process of buying clothes and equipment is painful as it reminds me when I am leaving and that I will have to leave all my loved ones behind.
I know I will love it, as many people have told me, but at times I know I will just want to come home.

How would you feel if you were in my position? Or my parents position?