You must not lose faith in humanity. Humanity is an ocean; if a few drops of the ocean are dirty, the ocean does not become dirty.
Try to practice forgiveness. Be prepared to forgive your own failures and the failures of others. When we forgive, we do it for ourselves, not the others. Forgiveness allows us to put down the burdens of guilt, regret, fear, anger, and hatred. But forgiveness doesn't require forgetting. Remembering allows us to change and to make better choices.
It is true that to live in a society, we have to adopt and practice faith, trust and forgiveness. As far as God is concerned, we must completely surrender to Him, The Lord Supreme. We must have faith in God almighty. There is nothing which He doesn't know. He does what is good for us. It is our duty to have complete faith in Him and surrender. Our faith and trust will be weighed by Him and we will get what we deserve.