Befriend needs a more logical solution..
Send : Click Befriend > befriend button deactivates > "invitation sent" status instead of "member already on your friend list" if the other user did not yet accepted/refused > the other user accepts/refuses invitation > befriend button re-activates only if user refused..
Receive: If you visit the profile who sent you a invitation a button with accept invitation and reject should be visible on that profile page..

Yeah :-) see more This is exactly that has to be done :-) Really important !!!