True repentance is something you choose to do. It becomes a habit of deep and endless surrender. When it's coupled with trust in Jesus' payment and Sovereignty, true repentance is life-changing.
Don't be like people whose religious, pious-sounding words of repentance are near Him while their hearts are far away.
In Matthew 15:8-9 (NKJV), Jesus quotes from Isaiah:
‘These people draw near to Me with their mouth, And honor Me with their lips, But their heart is far from Me. And in vain they worship Me, Teaching as doctrines the commandments of men.’
You'll need a new heart to pull this off. He's more than happy to give you one.