The greatest relationship we can ever have in this world is fellowship with the people of God, which is a greater fellowship than fellowship with our own unbelieving relatives, who mock Jesus Christ and treat him with contempt. We need to understand the importance of daily and weekly fellowship with the people of God, because they have received grace from God for you, and you have received grace from God for them. When we come together we are receiving and giving the grace of God, and our life is built up. Read the book of Acts and notice how the believers, in love and unity, lived in fellowship, joy, caring and sharing. And their spirits were being built up, and they were enabled to engage in the battles of the world.
Fellowship is important.
It does not mean that you just come to church and then go home without speaking to anybody. If you do that, you don't know what is going on. Relate to the people of God. Receive from people of God. Counsel them in the way of God.