Can i add players from my association as friend?

I want to have my teammates in association as friends also, but cant find the option...

There isn't any option for that unless some of you are playing (by luck) in the same server.
It's already in Suggestions section.

Otherwise friend them on Facebook & they will be added to your friends list

yes,by adding them in facebook if they have one

This should really be in the game, it's a real setback not to be able to do simple tasks like this on an association level, without having to involve a third party like facebook. :(

you cannot add somebody from different server unless through facebook