We are precious to God. We are His darlings, and He wants us to be tenderhearted, having healthy emotions that manifest His mercy. Mercy means that we don't receive the judgment we deserve. Grace means that God freely gives us blessings we do not deserve. Because we are God's beloved, He doesn't want our emotions to endure the judgment we really deserve.
A teenager I know was going through a hard time. I wrote notes to him every week and made him my friend. He wasn't doing well in school, but all he needed was to be loved. He needed the warmth of God when he did not deserve it, and he has come through it all amazingly well.
God calls us "beloved" even though we do not deserve it. Without even realizing it, we are becoming perfect through Christ. We will be like Him when we see Him as He is. He is perfecting us (Philippians 1:6). He has begun a good work in us and will perform it, for we are His beloved-His darlings-hid with Christ in God. It doesn't matter what you have done or when you did it. God calls you "beloved."
Just thank Him that you are.