Open your eyes.

You cry, you scream, you could even punch a wall if you want to. 

Once you have let all of that out, you lie down somewhere quiet, and close your eyes. You breathe. You stop thinking and you breathe. Keeping your eyes closed. Stay there for a good 5 minutes and just breathe. Slowly, take each breath and concentrate on it. You can keep your eyes closed for as long as you want, but you have to remember to take the slow breathes. 

This isnt going to make things go away, but it will help you to just relax and slow down. You are thinking too much, trying to figure things out, seeing consequences you dont want to see, and its getting to you all at once.

You are not a waste of space. You are not giving up. You are going to keep going and you are going to be happy. This sadness is only temporary. Things will get better, they always get better. 

You just have to sit down, and breathe.