Sometimes I find it annoying to add a person in my friends list. When they aren't online, you can't add them. That's why I would suggest to make the option to add a friend by entering their name instead of selecting them when they are online.

+1 if possible to add.

yes you add any Rome Clan members

that might cause some bugs such as party/experience/np by adding ourselves and get 2x np/exp .

but it's a nice idea as well

Not possible.