Smoking hot. I can tell by the way you post and the fact that you are still in college that you are young. Can I ask you how many concerts do you attend regularly? In my college experience I think I saw one cute girl rocking a Bathory backpatch (that could have been a dream as well haha) and the others were, as you described, not really "into" metal and more into shit like Cradle of Filth and Korn than Judas Priest. Most of these female metalheads that I know I have met at small bar concerts/metal bars/heavy metal festivals (like Frost and Fire Fest, Legions of Metal fest, Hell's Headbash fest, etc). So, if you start to attend more concerts you will, eventually, start to meet more females into metal.
Also, it helps to listen to bands that tend to draw a better crowd than your Slipknots and your Panteras because, let's face it, the people still into those bands past the age of 16 probably haven't ever heard of Mercyful Fate or something. Nearly all these metal females that I know are big into 80s heavy metal, NWOBHM, modern traditional heavy metal, etc. More of the less extreme side of things. Not that there aren't plenty of chicks into death and black metal (there are plenty).
It also depends on where you live. Any big city is going to have more people into the genre so, if you are like me and live in bumfuck Peoria, Illinois there are few, if any, females that are really into Saint Vitus and Pagan Altar. But once I go to Chicago, the door is wide open it seems.
tl;dr just wait until you get older, start drinking at cool bars and attending more shows and you'll meet em.
