God doesn't need us, but He does give us examples in the Bible that we should follow. He created us to Glorify Him, to love Him and enjoy Him forever. If we trust God and follow Him, by accepting His gift of salvation, we will spend eternity in Paradise with Him. We can and will delight in the wonders He is preparing for us there.
God wants each of us to...
Believe in Jesus Christ and follow Him (John 6:28-29), and tell others about Him (Psalm 96:2-3; Proverbs 11:30; Ezekiel 3:18).
Obey His commands, avoiding all sin. God knows everything we do, and He will judge us for everything that we do, and everything we fail to do (Ecclesiastes 12:13-14).
Love God and each other. "'Love the Lord your God with all your heart and with all your soul and with all your mind.' This is the first and greatest commandment. And the second is like it: 'Love your neighbor as yourself'" (Matthew 22:37-39).
Be humble in our attitude and actions toward God and others, not proud (Micah 6:6-8; Psalm 138:6; Proverbs 22:4; Isaiah 2:12-17; Matthew 5:5, 20:26-28; james 4:10).
God tells us in the Bible, His Word, what He wants us to do, how He wants us to live our lives. He provides for us valuable information about how to live our lives, what to do and what not to do. He gave us the ten commandments for a basic rules to follow including "do not lie," "do not steal," honor your father and mother, and more (Exodus 20:1-17; Matthew 19:19).
If we all follow God's rules, this world would be a much better place to live.