I can't believe I'm 24 and I miss being a teen
That sounds reasonable. What do you miss about being a teen?
I miss some of the fun things in my life when I was a teenager.
Many people are nostalgic about the good times we experienced in life. Just be careful not to dwell on that being the best time of your life when you still have a future waiting for you!
This is dumb, I don't want to hear about it anymore.
Sorry, but I just wanted to tell you that your feelings are valid from back then! I wish a lot too that I was back to being a teen, and it's wonderful that we have all these memories to appreciate. But I believe it's best to just move on, because we can make the present just as good.