The things you wanted to do during your youth are things that you probably thought were boring during your youth. I'm not sure what to tell you. Personally I'm against letting young people believe they're invisible and will never get old. It's a lie and they should be set straight early on before getting older and finding out that they just wasted a huge chunk of time. Honestly though, you're still really young. You will never be a spry teenage again, but you're not some feeble old man either. You want to make something of your life before it's too late? Start now! Figure out what you want and then proceed with working hard at making it happen. You can do this! :)