You may feel like this now, but you'll probably change when you get older. Everyone changes. 19 is still quite young, and I bet you $5 that you won't even like anime that much when you're 40.

However, it is not impossible to be asexual. See http://en.wikipedia.org/wiki/Asexuality. You could stay that way the rest of your life, but I don't think it would be a problem. Either way, I wouldn't worry about it. Just accept yourself for who you are.

Just don't buy a hug pillow. Those things are fucking creepy.