When we become believers, many if not all of our unbelieving friends will separate themselves from us. The more we serve the Lord the more this separation will occur. Some of the separation will be initiated by unbelievers and some of it will be initiated by the Lord. We cannot walk with God and with unbelievers. In spite of this separation we should continue to love them and witness to them. We should seek connections with them that will lead to their separation from the world too. This separation between God*s people and the Devil*s people is all over the Bible. Wise believers will regularly unite and fellowship with believers in Biblical churches. These things are the plan and work of God Himself and will be a blessing to us.
Exodus 11:7: But against any of the children of Israel shall not a dog move his tongue, against man or beast: that ye may know how that the LORD doth put a difference between the Egyptians and Israel.
2 Corinthians 6:14: Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness? 15 And what concord hath Christ with Belial? or what part hath he that believeth with an infidel? 16 And what agreement hath the temple of God with idols? for ye are the temple of the living God; as God hath said, I will dwell in them, and walk in them; and I will be their God, and they shall be my people. 17 Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you, 18 And will be a Father unto you, and ye shall be my sons and daughters, saith the Lord Almighty.
1 Peter 4:1: Forasmuch then as Christ hath suffered for us in the flesh, arm yourselves likewise with the same mind: for he that hath suffered in the flesh hath ceased from sin; 2 That he no longer should live the rest of his time in the flesh to the lusts of men, but to the will of God. 3 For the time past of our life may suffice us to have wrought the will of the Gentiles, when we walked in lasciviousness, lusts, excess of wine, revellings, banquetings, and abominable idolatries: 4 Wherein they think it strange that ye run not with them to the same excess of riot, speaking evil of you: 12 Beloved, think it not strange concerning the fiery trial which is to try you, as though some strange thing happened unto you:
Psalm 1:1-3: Blessed is the man that walketh not in the counsel of the ungodly, nor standeth in the way of sinners, nor sitteth in the seat of the scornful. But his delight is in the law of the Lord; and in his law doth he meditate day and night. And he shall be like a tree planted by the rivers of water, that bringeth forth his fruit in his season; his leaf also shall not wither; and whatsoever he doeth shall prosper.
Proverbs 4:11-18: I have taught thee in the way of wisdom; I have led thee in right paths. When thou goest, thy steps shall not be straitened; and when thou runnest, thou shalt not stumble. Take fast hold of instruction; let her not go: keep her; for she is thy life. Enter not into the path of the wicked, and go not in the way of evil men. Avoid it, pass not by it, turn from it, and pass away. For they sleep not, except they have done mischief; and their sleep is taken away, unless they cause some to fall. For they eat the bread of wickedness, and drink the wine of violence. But the path of the just is as the shining light, that shineth more and more unto the perfect day.