It's scary, but if you are confident in your decision, then you just have to have faith that it is right. You should go talk to your apartment manager and explain the situation to them. Does he have good enough credit to be on the lease? Sometimes they will allow a transfer. When I moved out of my sister's apartment, we were both on the lease, and we both had to sign a paper saying I was moving and no longer to be held responsible. Doesn't hurt to ask if there is anything they can do to help. Or you can ask them to keep note on your file that if your rent is late to notify you immediately, so it doesn't get so passed due it ruins your credit.
My other suggestion would be to just rent a uhaul and move everything at once. Moving things slowly makes it harder and gives you too much time to think and become overwhelmed.
Good luck! I know it's hard, but just be confident in yourself and your decisions :)
at 5:38 PM on Nov. 19, 2010