Is it normal i'm addicted on blood?

When I see blood, i have an unexplainable feeling. I like blood, but i don't like things like mutilation and that stuff, but i like things like paper-cuts... Recently I started cutting myself, normally when I was on a bad mod. It started like a way to forgive the psychological pain, but then it started to be like an addiction, now I think about cutting myself, even when I'm on a good mod, just to see the blood, and I started to like the knives pain. I just don't cut myself more times, because my friends "don't allow me". It's normal to feel pleasure cutting myself? is this any mental disorder? If you know any related case, can you help me controlling this? I appreciate your help, because this is really affecting me. Thanks