That was beautiful. In Jesus. Amen
Have you spoken to your foster family? If not you need to..everyone makes mistakes in life...it's part of growing up. Go to them and claim your mistake and learn from it. Apparently they are good people or you would not care about them so much. I am praying for you...Don't wait too long though it only makes matters worse.
Submit your prayer request. Thousands of caring people will see it and pray for you.
In Jesus name, Amen