Is there anything you've done that you're really proud of, but would never tell anyone you know?

When I was 12 (and up) my big sister was an alcoholic and later a drug user. I took care of her. Bathe her, dress her, feed her, and let her cry to me about how bad our life was, even though I knew she was the one causing our bad life, until she went to sleep. I have been homeless with her, to make sure that she would be ukay. I couldn't leave her like that. I stopped her times from committing suicide and self harm.
I had many talks with her, to make her do better in life. I feel like I kind of raised her, haha. But finally, she is better now. Back in school, looking for a job, and needing to do better.
It almost seems unreal.