Matthew 18: 15-17.
If your brother sins against you, go and tell him his fault, between you and him alone. If he listens to you, you have gained your brother.16 But if he does not listen, take one or two others along with you, that every charge may be established by the evidence of two or three witnesses. 17 If he refuses to listen to them, tell it to the church. And if he refuses to listen even to the church, let him be to you as a Gentile and a tax collector.
So the question remains, do you break fellowship with the body of believers before you follow the steps of these few scriptures? I would contend that you need to follow what Jesus said and see what happens. What do you feel like doing? No, it's easier to leave and not deal with brother's sin and in fact deal with your sin. Pray for us as we continue to walk through this situation this week.
Here is the link for the video below.