Click the link that says "Edit Friends". Put a check in the box next to the name of the friend you want to delete from your profile and hit the "Delete Selected" button.
Now click on the "Home" link at the top of your page to go back to your editing page.
Go back down to the "My Friend Space" box. There's a link in there that says "Invite Your Friends Here". This is the link you use to find new friends to add to your MySpace profile.
