> I have a few folks who I felt wronged me significantly in my life's travels, and they take a bit of rent-free space in my head every once in awhile.

Do you have grudge against those people, such that put effort into trying to undermine or defeat them? I feel the word "enemy" has connotations of a kind of direct, sustained opposition that just seems like it'd be really unusual (and unhealthy) in real life.