yea you have to go to your friends and find their name. It will say request pending next to their name and you should just be able to click cancel.
I don't think so. But if they do accept, immediately de-friend them. Or send them a message regards to why you want to de-friend them.
Hope this helps in some way shape or form
Yes, go to Account > Edit Friends,
and then find Lists-Friends
Find the person you want to delete and click the X to the right of their name.
Hope I helped! :)