How do you go about sharing your hobby with your girlfriend? How do you get her interested enough that she'll start exploring on her own?
Or do you not even bother?
Don't push anything on her. If you have a genuine interest and aren't a dick about sharing everything you like, she will ask eventually. Then show her what you like about your hobby. Don't inundate with a bunch of mundane facts (especially relevant to comics).
There's still a chance for you, anon. You don't have to be alone.
She liked Neil Gaiman novels, so i bought her the first volume of Sandman as a gift, then borrowed her The Long Halloween. We broke up after a while, but when i catched up with her she had started branching out a bunch more.
Next girl had next to no interest in comics, just anime.
You can't force people to like stuff, if they're into it they're into it.