Carey- I agree that being in a fwb situation makes it less likely that you will start looking for someone interested in a relationship. BUT, maybe you're not ready for a relationship yet.
My fwb situation is on a break for now. It was good for the short time it lasted, but it changed for me. I'm not saying I wouldn't consider another fwb situation, but more than likely not with him. I'm leaning more toward dating, but just a little scared to take that first step.