The purpose of having a country and friends is to achieve an ideal objective; if one finds their self on a path without ideals (for example in a crowd with people who hinder idealism) then the person is not betraying anyone so long as the person affirms to their ideals. Of course sometimes we slip up and say stuff we do not mean, which is why the spoken and written words are the most forgivable. So long as the ideals of the country are upheld by decent citizens, then there may not ever be a shortage of good friends... If one does have friends without ideals, it is in the best interest of the one to affirm to the country and seek out better friends.
Undoubtedly there may be people who exaggerate the actions and behaivours of others so completely they themselves are the first shots in the art of betrayal. Such exaggerations tend to be brought on by failure to idealize and an indecision to act on performing for the ideal of home-worthy friends and a utopian country that feels like home.
Lastly, the best friends are those who are above and beyond betrayal and concern themselves with more pressing matters, such as "how shall mankind establish a global unified federation of united nations by the most peaceful means possible?"