Repentance does not mean just saying that you are sorry. The word means : to turn from sin and dedicate oneself to the amendment of one's life.
I recently was reading Acts chapter 2 and Peter addressed the crowd and said:
38 Reconsider your lives; change your direction. Participate in the ceremonial washing of baptism[d] in the name of Jesus God’s Anointed, the Liberating King. Then your sins will be forgiven, and the gift of the Holy Spirit will be yours. 39 For the promise of the Spirit is for you, for your children, for all people—even those considered outsiders and outcasts—the Lord our God invites everyone to come to Him.
