"...and be renewed in spirit of your mind, and that you put on the new man which was created according to God, in true righteousness and holiness." Ephesians 4:23-24
No matter what anyone says about your sins, your old self, to anyone, know this, you are not that person anymore. If you have Christ in your life, you are new. People can believe what they want and who you are.
The past you people talk about, God doesn't see that. He sees you and how much more of a relationship He can have with you. People see flawed. God sees clean. People see sins. God sees forgiven.
I can't tell you how many times my past self has set me back. How many times satan tries to shove it in my face and I let him. I'm not that person anymore. I am new. And I won't let the past me change the new me. I want God to continue changing me.
Forget about your old self, know that you are different. Know that you have changed. You are new. In the words of Carrie Underwood, "I am changed, and now I'm stronger."
When God sees you, He sees that His son died for your sins. He sees Jesus' blood. You are white as snow.