Parent doesn’t want to overstep with bullied son

DEAR HARRIETTE: My son is being bullied, and I feel powerless to help him. It brings back painful memories of when I was a kid and how much worse things got for me when my parents got involved. I fear that the same thing will happen if I try to intervene. Should I talk to my son's school or just hope he is strong enough to cope on his own?

How do I know if the bullying has gone too far and what sho…