It is not necessary that if you are breaking up, you need to have enmity towards each other. It is true that if you can always remain close friends even if you have separated as husband and wife. 

Malaika Arora and Arbaaz Khan: They have officially separated and divorce proceedings are on but Arbaaz has confirmed that the couple are still very cordial to each and ready to share their responsibilities as a parent. 

Aamir Khan and Reena Dutt: The two are still in touch and they still interact socially.

Hrithik Roshan and Sussanne Khan: Just a month back Hrithik and Sussanne took a holiday together along with their kids.

Nandita Das and Subodh Maskara: Nandita confirmed that they have split as a couple but not as friends.

Farhan Akhtar and Adhuna Bhabbani: Yes, they have split too but not as friends.