Believing in someone or putting full faith in someone is a hard thing. Man has a sinful nature that always challenges their good judgment. Those who you think you can trust will sometimes let you down.
If you want someone to trust you, you must give them your trust. You must also show them that they can trust you. By just saying it doesn’t make it true.
Yeshua (Jesus) showed us that we can trust Him by giving Himself for us. When He died on the cross, Yeshua gave us a reason to have faith in Him. Proverbs 3:5 tells you to “trust in the LORD with all your heart.”
Even when you feel as if there is no one in your life that you can trust, there is always One who is worthy of your trust.