You can never be too sure in this day and age, who is really your friend, or who might have set out to betray you. I hate to be cynical, but if you’ve ever experienced the hurt of betrayal, it creates a stronghold causing you to examine everyone more closely. Pray for Jesus to release you and give you freedom from such as this, but give you the ability to use your experience as a tool of discernment.
Jesus, who knew the hearts of his disciples, was able to call out the weaknesses of those who were amongst them. During the Passover meal, he warned them of what was coming next, and that he would be betrayed by one of them. Even so, they were still in shock when they witnessed what had happened.
Be wise in your dealings, and protect yourself with prayer; because even at church, like among the disciples, there are people whose hearts have not been cleansed by Jesus.
But behold, the hand of him who betrays me is with me on the table. For the Son of Man goes as it has been determined, but woe to that man by whom he is betrayed!” Luke 22:21-22