"My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous:
"And he is the
propitiation for our sins: and not for ours only, but also for the sins
of the whole world." (1 John 2:1-2)
If we sin, we have an advocate with our Father in Heaven through His Son, who justifies us.
We do not confess our sins in order to be justified, but rather we confess because we have been forgiven!
Jesus's death on the Cross is God's love for us:
"Herein is love, not
that we loved God, but that he loved us, and sent his Son to be the
propitiation for our sins." (1 John 4: 10)
Because Jesus died on the Cross, God has promised that he will never, ever remember our sins.
"For I will be merciful to their unrighteousness, and their sins and their
iniquities will I remember no more." (Hebrews 8: 12)
In other words, even if we wanted to say "I'm sorry", for God there is no point, because He remembers our sins no more. Paul identifies this clearly for us in His definition of Love, which God is (1 John 4: 16):
"It is not rude, it is not self-seeking, it is not easily angered, it keeps no
record of wrongs." (1 Corinthians 13: 5, NIV)
God keeps no record whatsoever of our wrongs.
His love means that we never have to say ''I'm sorry!"