So to provide a little bit of context to my question I put up a scenario that happened at school.
A friend and I were talking about some horror movies and we happened to end up talking about what we feared most. Seeing as he was a really creative and artistic person he said that he feared his 'imagination'as he described it as nice yet also occasional confronting in a mental sense.
Another friend stated that he feared his 'memory' as he says that thinking back sometimes made him relive his worst moments such remembering about the death of one of his family members.
I wanted to know whether boggarts are able to take form of abstract fears and if so, how would they be going about it?