an astro nut!
Racist
Morbid.
lexicologist.
Well it depends. If you're a man and you're obsessed with another man well it's called being gay. And if you're a girl and you're obsessed with men it's called love!
It could be a chronophile (one who is obsessed about time).
Custy
crazy cat person
Not thinking independently
A person that loves all things French might be called a Francophile.
A person that hunts dinosaur bones is called a paleontologist.
A person obsessed with water may be referred to as a "hydrophile" or "hydrophilic."
an obsessed person is somebody who only thinks of one thing and does it all the time