2 Thessalonians 3:14-15
14 And if any man obey not our word by this epistle, note that man, and have no company with him, that he may be ashamed.
15 Yet count him not as an enemy, but admonish him as a brother.
-The Bible makes it very clear that light can have no fellowship with darkness (2 Corinthians 6:14), however, it seems that the exact course of breaking fellowship is made a matter of debate for some. As stated in 2 Thessalonians, breaking fellowship does not mean that we have only hatred and contempt for a person in our heart; neither does it mean forgetting about the person altogether. Breaking fellowship with one who is disobedient to the Lord’s commands should be treated the same as dealing with a close family member who has done wrong; you’re always mindful of the conflict while it exists, but you never forget that they are still family. You don’t look for reasons to hate those you truly love, you look for reasons to forgive those you truly love. That’s how the Lord treats us (Romans 5:8) and that’s how the Lord expects us to treat one another.