Many people express pain when they believe Nonviolent Communication should enable lasting connection between any two people - I would say there is absolutely zero hope of this* - but NVC can help two people get to unity quicker, for example, to get to agreement that they aren't going to be in regular contact. Since I reached this understanding I have had much less stress and conflict in my life, especially with NVC people!
* because of personality clashes, circumstances, preferences, differences in style, cultural differences, different priorities in NVC learning, different life priorities, and above all different needs in relation to communication/friendship at any one time.