We should not device evil against our neighbour.
Devise not evil against thy neighbour, seeing he dwelleth securely by thee. — KJV, Proverbs 3:29
Its unwise to despise our neighbour.
He that is void of wisdom despiseth his neighbour: but a man of understanding holdeth his peace. — KJV, Proverbs 11:12
He that despiseth his neighbour sinneth: but he that hath mercy on the poor, happy is he. — KJV, Proverbs 14:21
Poor neighbours are hated.
The poor is hated even of his own neighbour: but the rich hath many friends. — KJV, Proverbs 14:20
A neighbour can know stuff about you.
He that is first in his own cause seemeth just; but his neighbour cometh and searcheth him. — KJV, Proverbs 18:17
If you are poor and separated from your neighbour, dont dispare but believe.
Wealth maketh many friends; but the poor is separated from his neighbour. — KJV, Proverbs 19:4
We should not witness against our neighbour without a cause.
Be not a witness against thy neighbour without cause; and deceive not with thy lips. — KJV, Proverbs 24:28
Try not to strive against your neighbour.
Go not forth hastily to strive, lest thou know not what to do in the end thereof, when thy neighbour hath put thee to shame. — KJV, Proverbs 25:8
We should debate with our neighbour between four eyes.
Debate thy cause with thy neighbour himself; and discover not a secret to another: — KJV, Proverbs 25:9
We should love our neighbour.
Honour thy father and thy mother: and, Thou shalt love thy neighbour as thyself. — KJV, Matthew 19:19
 Master, which is the great commandment in the law?
 Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind.
 This is the first and great commandment.
 And the second is like unto it, Thou shalt love thy neighbour as thyself.
 On these two commandments hang all the law and the prophets.— KJV, Matthew 22:36-40
Love God and love thy neighbour is the whole law.
 And, behold, a certain lawyer stood up, and tempted him, saying, Master, what shall I do to inherit eternal life?
 He said unto him, What is written in the law? how readest thou?
 And he answering said, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy strength, and with all thy mind; and thy neighbour as thyself.
 And he said unto him, Thou hast answered right: this do, and thou shalt live.
 But he, willing to justify himself, said unto Jesus, And who is my neighbour?
 And Jesus answering said, A certain man went down from Jerusalem to Jericho, and fell among thieves, which stripped him of his raiment, and wounded him, and departed, leaving him half dead.
 And by chance there came down a certain priest that way: and when he saw him, he passed by on the other side.
 And likewise a Levite, when he was at the place, came and looked on him, and passed by on the other side.
 But a certain Samaritan, as he journeyed, came where he was: and when he saw him, he had compassion on him,
 And went to him, and bound up his wounds, pouring in oil and wine, and set him on his own beast, and brought him to an inn, and took care of him.
 And on the morrow when he departed, he took out two pence, and gave them to the host, and said unto him, Take care of him; and whatsoever thou spendest more, when I come again, I will repay thee.
 Which now of these three, thinkest thou, was neighbour unto him that fell among the thieves?
 And he said, He that shewed mercy on him. Then said Jesus unto him, Go, and do thou likewise.— KJV, Luke 10:25-37
The parable of the good samaritan answers the question who is my neighbour?
Love worketh no ill to his neighbour: therefore love is the fulfilling of the law. — KJV, Romans 13:10
To love your neighbour is well defined as do things that work no ill to your neighbour.
Thou shalt not hate thy brother in thine heart: thou shalt in any wise rebuke thy neighbour, and not suffer sin upon him. — KJV, Leviticus 19:17
And yes we should rebuke our neighbour.
How should we deal with our neighbour ?
We should love our neighbour.