This is the same as for friendship.. The word is simply trust.. Stop trusting someone is like destroying a pillar in a building.. To put it simple, you are destroying the friendship..
I realised that when the end of a friendship starts when someone stops trusting that friend of his or her.. Talking about conflicts with friend, I realised that people stopped trusting. But they do not know the consequences of stop trusting..
Let us just remembered that trust is simply the pillar of a friendship.
Source:
http://www.jkinteriordesign.co.uk/columns/ornamental-pillar-7b.jpg