Consider how it must grieve the Lord Jesus when, having given so much in love to set us free, we still cling to our past mistakes and errors. The debt has been fully paid, whether we avail ourselves of the freedom we now have, or not. But it would be a waste not to "press on, that I may lay hold of that for which Christ Jesus has also laid hold of me" (Php 3.12).
The question now is whether we are going to find our identity in Christ, or whether we will cling to the old man the world had shaped us into. Holding onto the old will end in fruitlessness or even death. You can't drink deep of God's mercy and grace while you're focusing on yourself and the past. Embracing the fulness of Christ's forgiveness doesn't mean we are flippant about what it cost Him to save us. Far from it, we understand the seriousness of our sins and the high price He paid. We begin to see it as a measure of His love for us, and we love Him all the more in return.
So ultimately you best honor the Lord and what He did for you when you accept His forgiveness and get over yourself, so you can live your new life to the full for Him.
For the love of Christ controls us, since we have concluded this, that Christ died for all; therefore all have died.
And he died for all so that those who live should no longer live for themselves but for him who died for them and was raised.
So then from now on we acknowledge no one from an outward human point of view. Even though we have known Christ from such a human point of view, now we do not know him in that way any longer.
So then, if anyone is in Christ, he is a new creation; what is old has passed away – look, what is new has come! -2Cor 5:14-17