You confess that Jesus is Lord

You confess you are a sinner, but that's only a confession... 

Confession is to confess or acknowledge something or some wrong you have committed. Confession does not necessarily mean you stop doing it, it only means you acknowledge it. 

 You can acknowledge and confess something or some wrong 100's of times, but it's still attached to you because you have not repented and turned away from it...

Repentance means sorrowful - To be sorry and stop doing the thing or sin you are committing.  

Psalm 78:17
But they continued to sin against him, rebelling in the desert against the Most High

Isaiah 64:5
You come to the help of those who gladly do right, who remember your ways. But when we continued to sin against them, you were angry. How then can we be saved?

Repentance- Job 36:10
He makes them listen to correction and commands them to repent of their evil.

Isaiah 30:15
This is what the Sovereign LORD, the Holy One of Israel, says: "In repentance and rest is your salvation,

Matthew 3:2
and saying, "Repent, for the kingdom of heaven is near."

Matthew 4:17
From that time on Jesus began to preach, "Repent, for the kingdom of heaven is near."

Matthew 11:20
[ Woe on Unrepentant Cities ] Then Jesus began to denounce the cities in which most of his miracles had been performed, because they did not repent.

Mark 6:12
They went out and preached that people should repent.

Luke 5:32
I have not come to call the righteous, but sinners to repentance."

Luke 13:3
I tell you, no! But unless you repent, you too will all perish.

Acts 2:38
Peter replied, "Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins. And you will receive the gift of the Holy Spirit.

Acts 3:19
Repent, then, and turn to God, so that your sins may be wiped out, that times of refreshing may come from the Lord,

Acts 26:20
First to those in Damascus, then to those in Jerusalem and in all Judea, and to the Gentiles also, I preached that they should repent and turn to God and prove their repentance by their deeds.

Corinthians 7:10
Godly sorrow brings repentance that leads to salvation and leaves no regret, but worldly sorrow brings death.

Corinthians 12:21
I am afraid that when I come again my God will humble me before you, and I will be grieved over many who have sinned earlier and have not repented of the impurity, sexual sin and debauchery in which they have indulged.

Revelation 3:3
Remember, therefore, what you have received and heard; obey it, and repent. But if you do not wake up, I will come like a thief, and you will not know at what time I will come to you.