Perhaps needs to add going through it was depressing (8)
I believe the answer is:
saddened
'going through it was depressing' is the definition.
I can't tell whether this definition defines the answer.
'perhaps needs to add' is the wordplay.
'perhaps' indicates anagramming the letters.
'needs'+'add'='needsadd'
'needsadd' anagrammed gives 'SADDENED'.
Can you help me to learn more?
(Other definitions for saddened that I've seen before include "unhappiness" , "Made unhappy or melancholy" , "Distressed" , "Made sorrowful" .)