It's not possibe to copy a route to another person's account. The easiest way to share a route is to send them a link to it (select SHARE from the menu above the map when viewing a route to get the link). If they want to they can then save a copy of this to their own account.
Regarding adding friends, please see my answer to your other post on this here.
Can you send a route straight to someone elses account or add a freind.