I want my friend to view my position with a restricted account, how?

Login to your account, click the little "gear" icon on the bottom of the map, "Account" > "General" > "Manage Sub-Account", where you can create "view-only" accounts with password. Give this sub-account and password to your friend, and they will be able to view your locations without viewing/modifying you account settings.

You can also restrict which unit(s) the sub-ccount can view.