Trust means to believe.
I trust you, means I have no doubt in my mind about your honesty, integrity and credibility.
No relationship can survive without trust.
How to develop and keep the trust in a relationship forever, because as soon as the trust breaks, the relationship breaks.
Trust is the foundation on which a relationship is built.
If you don’t trust a person, howsoever you may love him/her, your relationship will not survive, because you have no trust in him/her.