Two Dogs Friends

Engaging in a romantic relationship can change the dynamics of a platonic relantionship; in the event of a break-up, close friends who become romantically involved may experience difficulty in successfully resuming a comfortable friendship.
Non-personal friendships
Although the term initially described relations between individuals, it is at times used for political purposes to describe relations between states or peoples (the "Franco–German friendship", for example), indicating in this case an affinity or mutuality of purpose between the two nations.