Here's a few things the Bible has to say about fellowship:

Psalm 133

A song of ascents. Of David.

¹ How good and pleasant it is when brothers live together in unity!
² It is like precious oil poured on the head,
   running down on the beard,
   running down on Aaron's beard,
   down upon the collar of his robes.
³ It is as if the dew of Hermon
    were falling on Mount Zion.
    For there the LORD bestows his blessing,
    even life forevermore.

John 13:34

  "A new command I give you: Love one another. As I have loved you, so you must love one another."

Acts 4:32

All the believers were one in heart and mind. No one claimed that any of his possessions was his own, but they shared everything they had.

1 John 3 (NIV)

¹How great is the love the Father has lavished on us, that we should be called children of God! And that is what we are! The reason the world does not know us is that it did not know him. ²Dear friends, now we are children of God, and what we will be has not yet been made known. But we know that when he appears, we shall be like him, for we shall see him as he is. ³Everyone who has this hope in him purifies himself, just as he is pure. ⁴Everyone who sins breaks the law; in fact, sin is lawlessness. ⁵But you know that he appeared so that he might take away our sins. And in him is no sin. ⁶No one who lives in him keeps on sinning. No one who continues to sin has either seen him or known him. ⁷Dear children, do not let anyone lead you astray. He who does what is right is righteous, just as he is righteous. ⁸He who does what is sinful is of the devil, because the devil has been sinning from the beginning. The reason the Son of God appeared was to destroy the devil's work. ⁹No one who is born of God will continue to sin, because God's seed remains in him; he cannot go on sinning, because he has been born of God. ¹⁰This is how we know who the children of God are and who the children of the devil are: Anyone who does not do what is right is not a child of God; nor is anyone who does not love his brother.

Love one another

¹¹This is the message you heard from the beginning: We should love one another. ¹²Do not be like Cain, who belonged to the evil one and murdered his brother. And why did he murder him? Because his own actions were evil and his brother's were righteous. ¹³Do not be surprised, my brothers, if the world hates you. ¹⁴We know that we have passed from death to life, because we love our brothers. Anyone who does not love remains in death. ¹⁵Anyone who hates his brother is a murderer, and you know that no murderer has eternal life in him. ¹⁶This is how we know what love is: Jesus Christ laid down his life for us. And we ought to lay down our lives for our brothers. ¹⁷If anyone has material possessions and sees his brother in need but has no pity on him, how can the love of God be in him? ¹⁸Dear children, let us not love with words or tongue but with actions and in truth. ¹⁹This then is how we know that we belong to the truth, and how we set our hearts at rest in his presence ²⁰whenever our hearts condemn us. For God is greater than our hearts, and he knows everything.  ²¹Dear friends, if our hearts do not condemn us, we have confidence before God ²²and receive from him anything we ask, because we obey his commands and do what pleases him. ²³And this is his command: to believe in the name of his Son, Jesus Christ, and to love one another as he commanded us. ²⁴Those who obey his commands live in him, and he in them. And this is how we know that he lives in us: We know it by the Spirit he gave us.

Philippians 1:1-11  (NIV)

   ¹Paul and Timothy, servants of Christ Jesus, to all the saints in Christ Jesus at Philippi, together with the overseers and deacons:

 ²Grace and peace to you from God our Father and the Lord Jesus Christ.

Thanksgiving and Prayer

   ³I thank my God every time I remember you. ⁴In all my prayers for all of you, I always pray with joy ⁵because of your partnership in the gospel from the first day until now, ⁶being confident of this, that he who began a good work in you will carry it on to completion until the day of Christ Jesus.

  ⁷It is right for me to feel this way about all of you, since I have you in my heart; for whether I am in chains or defending and confirming the gospel, all of you share in God's grace with me. ⁸God can testify how I long for all of you with the affection of Christ Jesus.

 ⁹And this is my prayer: that your love may abound more and more in knowledge and depth of insight, ¹⁰so that you may be able to discern what is best and may be pure and blameless until the day of Christ, ¹¹filled with the fruit of righteousness that comes through Jesus Christ–to the glory and praise of God.