"Im A 25yro Banker Who Still Dates Goth Girls. Is There Something Wrong With Me?

Long post, but well worth the read. Oh, and if you think the goth girl fetish is something to be ashamed of, wait 'til I tell you about hentai.
"Hi guys, long time poster here, and even longer time lurker (was gone for a bit of hiatus). For the record, this is NOT a troll post. If you think it is, please refrain from replying because I need a genuine opinion here. (Thanks). I'm posting under anonymity for obvious reasons as colleagues/clients know me and I don't want this stuff on the net.
Here's the story (and rationale): I'm a 25yro who is apparently still stuck in my old high school days of punk rock and wearing lots and lots of black. I'm currently dating a 19 year old girl (3 months now) who attends nearby college in NYC. The catch: She's into the whole 'goth' thing, dresses like one (though not too hardcore), listens to that kind of dark music, and wears a bracelet with a small vial of our mixed blood in it (not kidding). I have an identical bracelet although I take it off at work. She wears mascara and eye shadow frequently and when we're out, always wears a lot of black.
On date nights, though, she sports an expensive black leather jacket..(Google search 'Kate Beckinsale underworld movie' to see the wardrobe she attempts to imitate with that). I don't buy shit for her; She apparently has a big-law partner for a father (who was never there in her life) that paid for all expenses. Now, girls like her is similar to the 4+ girls I've dated the last 6 years, and the 30+ girls I've slept with (though shes the only one who is wealthy). I'm only attracted to these kinds of women for some reason; I never got rid of this habit I first acquired back in high school. While most 'goth girls' are ugly, or overweight (morbidly too, no pun intended), I find many of the slim ones are damn sexy. Especially on the days they dye their jet black hair, to blood red. New Years Eve, she dressed up as a vampire and we did a little roleplay. 'Normal' girls don't seem to be into that sort of thing -- that whole, dark, demented, 'i-want-to-fuck-you-to-death' kinda feeling.
For those of you who have no idea what I'm talking about, go to Google images when you're not at work and search for 'redhead goth girl.'
Now, THE ISSUE: I feel like I am getting too old and white collar to still be into this kinda thing, but I really can't help it. Regardless of the amount of hot 'normal' women who flirt with me, either at work or after work at clubs/bars with colleagues, I can't ever find myself to want to get in their pants. When I see a slim goth girl with jet black hair, it's like WHAMM, that chill goes up your spine and you just want to.....you know?
One day I wish to get engaged. But what the fuck do I tell my family, friends, colleagues, and clients when they check out my lifestyle? Even if that wasn't an issue, is there something seriously fucking wrong with me? I was heavily into this shit back in high school; I thought it was just a phase and I'd get over it in college. Well, I DID get over it, in that I no longer dress in all black and listen to goth metal music. But I'm still fucking obsessed with these sorts of women. At this time, I have tried everything in trying to change my tastes...to no avail. There was even a cute blonde friend who heavily flirted with me; I flirted back; she was bubbly and fun, but never could really get me turned on.
Suggestions and opinions welcome.
My background: I work in IB--restructuring and attended an Ivy, and have been sleeping with women who think they're sexy little vampires, ever since I was in 9th grade. All my male/female friends are totally normal but, with the exception of my closest bud, have no idea who i'm dating. I'm too embarrassed to talk about this with anyone in real life."
[Photo via @luxerubbish]