I have been lying to myself about being depressed and it has cost me my youth.
What happened to your youth?
I stayed at home all the time, I was unable to do fun things, I couldn't stay up late and have a good time with friends. I feel like I have lost a big part of my youth.
Well, you found out the hard way that lying is never right. You have lost all that time and experience because of something you never had. Now that you realize it, you can only move forward and know what not to do next time.
I would never do this again in the future because I regret it.
That's good. Learning from past mistakes is important. Just be honest with yourself going forward.