Let me repeat...
GOD CHOSE YOU.
But we ought always to thank God for you, brothers and sisters loved by the Lord, because God chose you as first-fruits to be saved through the sanctifying work of the Spirit and through belief in the truth.
2 Thessalonians 2:13
You, my sweet friend, have been chosen by our Great God. He sees you, knows you, loves you and chooses you.
Stop downgrading yourself. Stop feeling depressed. Stop worrying. Relish in the fact that you are chosen.