Yes. To in vite someone to your friends list just type /friendinvite followed by the char name that you want on your list. You can view the complete list by hitting alt-b and selecting the friends tab from that window. Or hit the msn messenger icon on the lower left of your chat window and click the friends tab there.
But if you really wanna... type /invitefriend [name of friend]
Then if you want to view it you can time /friendlist or you can go to the in game MSN and see it since it will list your friends on a certain tab. Or you can go into the community menu and look for your friend list.