Learn English – “Feel bad about someone” versus “feel bad for someone”

The normal usage would probably be "for", indicating that you are nostalgic and wistful, wanting to be back there in your childhood.

"about" is also perfectly OK, but this has less sense of actually wanting to return there.

So it would make sense to write "I am nostalgic for my childhood - I wish I could be a child once more!" and "I am nostalgic about my childhood, but life has moved on, and what is past is past, with some wonderful memories".

In one possible interpretation, the situation represents harassment (“Persistent attacks and criticism causing worry and distress”). Under other interpretations, some of the following verbs may apply.
• intimidate, “To make timid or fearful; to inspire or affect with fear; to deter, as by threats; to dishearten; to abash”
• chivvy, “To subject to harassment or verbal abuse; To coerce, as by persistent request”
• tyrannize, “to oppress someone; to rule as a tyrant”
• browbeat, “To bully in an intimidating, bossy, or supercilious way”
• bully, “ To intimidate (someone) as a bully; To act aggressively towards”
• micromanage, “To manage, direct, or control a person, group, or system to an unnecessary level of detail or precision.”
• enslave, “To make subservient; to strip one of freedom; enthrall”
• domineer, “To rule over or control arbitrarily or arrogantly; to tyrannize”
• dominate, “To exert an overwhelming guiding influence over something or someone”