I understand trust to be your firm, total or absolute belief in something or someone, and in a way, it is similar to the understanding of faith, which is the ability to believe in something we can't see with our physical eyes.
I saw a movie some time back about people who blindly follow and believe in some leaders who have brainwashed them that their way is the only way to live, and because of the trust they have in these leaders they buy the idea or lie and it becomes law to them, they start to leaving their lives according to what the have held and what was said to them by the leaders who just play mind games with them, for selfish reasons and the power to control what their followers do.
It doesn't just happen in movies alone even in real life so many people get exploited because they are too trusting, I have been a victim a friend in school before i knew about crypto properly, took advantage of the trust I had for him to scam me off my money I was supposed to use for my textbooks, upkeep and all my savings at that time, he told me he had a business that he wants to introduce to me called "Blockchain" that I would need $50 to create a Blockchain wallet and another $100+ for investing.
So because I trusted him I did all he asked, $150+ was a whole lot for me back then in school, I almost went into depressions when he told me and others who invested through him, that all our accounts were hacked and all our money was stolen, when I found out that he lied to me, it made it really hard for me to trust anyone but I have some real friends from way back that I still trust and believe in them a lot, friends like 
I'm someone who if you lose my trust or you try to take advantage of me, it will be almost impossible to trust you again it doesn't mean I won't forgive you but the trust is gone, now anytime that my friend who scammed me calls me, I hardly pick up the phone or if I eventually pick up the phone, once he mentions investment, business or money related stuff, I tell him am not interested or just hang up, but he has lost my trust once I come to money or business.
Sorry to say this but even in churches (Christian and Muslim) these days, peoples trust can be taken advantage of or is been taken advantage of already, because they trust too much, they sometimes see their religious leaders as mini Gods or God and some take it to the extreme of even worshipping or put the religious leaders over God they serve, I'm not saying to trust your religious leaders is bad, but be smart so you don't trust the wrong the person.
According to 
Even so, NOT all couples last forever, in some cases relationships break and all that illusion of trust and connection runs off like water through our hands, an emotional vacuum is created when we see the person we want go and this is usually too painful and if there was dependence it can last a long time.