Hi, Ok, bare with me

I have forwarded port 21 from my router and created an account on dyndns.org to keep tabs on my ip address and set up a ftp server (vsftpd). I can login via ftp with filezilla using my user credentials and get access to my home directory.

So this is good so far, but I also want to create another folder in /home (outside my user folder) called ftp for my friend to be able to download from -- while I can read/write to it. What would be a good way to only give him ftp download access to this folder while keeping him out of my user folder?

Thanks