Fellowship is a part of faith, but you gotta remember what a church actually is:

20 For where two or three gather in my name, there am I with them.”

Unfortunately that has to do with confronting people sinning in the church.
"But if they will not listen, take one or two others along, so that ‘every matter may be established by the testimony of two or three witnesses.’ 17 If they still refuse to listen, tell it to the church; and if they refuse to listen even to the church, treat them as you would a pagan or a tax collector.