Are you scared of spiders? Do you just HAVE to kill it if you see one in your house?

I have the same problem, but with lizards. Yesterday I found 1 in my room and I had to get my mom to come kill it or get it out of my room. I know that they don't hurt anybody, but I just can't stand to think that while I'm sleeping that thing might me walking over me. I get chills only talking about it.