Let the love of God make you perfect.
We've all sinned, but if we confess our sins, God is faithful to forgive us. God forgives, and other people forgive, too. I know that my wife loves to hear me say, "I'm sorry; I love you," even if I was right. That's what God wants to hear. That's what your brothers and sisters want to hear.
You take the next step to knowledge, to temperance, to patience, to love.