I feel like I'm a failure and like I have no future.
Do you think you'll always feel this way?
I guess not, a lot of people have a pretty normal future after their youth
It's mature of you to see things that way, and I think that's a good sign for your future.  Bad things and periods in life are usually temporary!  You'll do better in the future, I promise!
Thanks for the suggestion. :)
It's good to be aware that most things that happen in life are temporary. If you're young (and often even if you're not), you have plenty of time to improve your future.