'As sad as they come!' ( = 'più triste di così è difficile') is how this well-known, soul-searching song may be summed up.

Words and phrases to listen out for:

1. you're sure you've had enough = sei sicura/o di non poterne più;
2. hang on/hold on = aspetta un attimo;
3. you feel like letting go = hai voglia di mollare;
4. everybody cries, and everybody hurts, sometimes = ci sono momenti in cui piangono
    e soffrono tutti;
5. you feel like you're alone (si può anche dire ''as if' o 'as though' al posto di 'like' = ti 
    sembra di stare da sola/o.

This is the link to the song with subtitles:

https://www.youtube.com/watch?v=wXT7X_bf9lU

P.S. reading the comments people leave below songs on YouTube can be both interesting and very good for your English.