I used to be slightly arachnophobic. I did exactly what you did, look up hundreds of pictures of spiders and tarantulas, but it seems that your case is worse than mine was. I didn't stop though. I kept researching everything about spiders, all they do, as my fear did nothing more than fascinate me.

Eventually the fear went away. In the end I realized that the main reason I was scared of spiders was because I let myself be subject to the fear. You have to overcome that, not by just staring at pictures of the scariest spiders you can find, but by assuring yourself that spiders are just creatures of life, just like us, and they are more scared of us than we are of them. It was just more of a phase than anything.

Well, I hope that helps.