A good example of Friendship between God and man is the relationship between God and Abraham. When God told Abram that he would be the father of many nations, he trusted Him (Gen 17), when God asked Abram for his son, he gave him wholeheartedly (Gen 22), when Abimelech took Abraham's wife, God confronted Abimelech personally (Gen 20:3), when God wanted to destroy Sodom and Gomorrah, He chatted with Abraham first (Gen 18).
I believe God wants to have this kind of relationship with everyone. We need to move on from a 'Stranger relationship' to a 'Father-child relationship' and then to a 'Friendship relationship'. God has been reaching out to us individually and He's still doing so today, are you going to respond to His call?
Any friendship requires a lot of sacrifice, God has made the first move by giving His only Son - Jesus, to us. Friendship also requires trust, can you trust God totally? do you trust Him, do you believe His promises? can He trust you? Friendship requires giving and sharing, have you given God your life? your will? Any good friendship is built on communication, how often do you talk with God, in praying, in reading the Word? how much time do you give to Him out of the 24hrs of your day?
Just like with King David in the Bible, who had many mighty men who fought with him for the kingdom, but had the three mighty men who were called the first three (Adino, Eleazar and Shammah) who were willing to give their lives for him (2Sam 23), we should not be satisfied to just be numbered among the 'Christians' who focus more on just the Kingdom, but aim for a higher level, to be numbered with those who are first and foremost, after The King, before the Kingdom. Chase The King and not just the Kingdom and/or Its benefits.
First and foremost, give your life to Him and get into a relationship with The Holy Spirit, for it is He who would help you to develop and cultivate a healthy Friendship relationship with your Heavenly Father (2Cor 3:18). The Grace of our Lord Jesus Christ, and the Love of God, and the communion of The Holy Ghost, be with you all. Amen (2Cor 13:14).
This is food for thought, for everyone of us, including myself..... Peace!