Having your kids believe its their fault or worse yet that there's something they can do about it is the worst. I agree your child should see a therapist who specializes in dealing with children if this is a persistent issue.
Regarding antidepressents and specifically SSRI's, they do not alter your mood or change your personality. What they do is prevent you from dwelling on negative thoughts. You'll still have all the negative thoughts that you would have otherwise, but you won't get "stuck" dwelling on them, they help your brain to move on. That's pretty much all they do, they certainly don't make you happy.
Acc
Married 18, Together 20, Now Divorced M: 48, W: 50, D: 18, S: 16, D: 12 Bomb Dropped (EA, D): 7/13/11 Start Reconcile: 8/15/11 Bomb Dropped (EA, D): 5/1/2014 (Divorced) In a New Relationship: 3/2015