I had sex with a co worker on a lunch break. I know it doesn't seem like a really big thing but I really didn't know him at all being that he was a new employee. I use to think that having sex with a person outright didn't determined a relationship because majority of my boyfriends have been the "one night stand" scenario. It is really unlike me but I'm starting to like him, more than I should at this point. For some reason he makes me nervous. I avoid calling him because I don't want him to think that I'm bugging him (I know how I use to feel about guys doing that). I guess I would like more of a personable relationship him, sort of like friends. I'm never like this and it feels weird. My question is how can I stay in control now that sex is involved? I want to keep having sex with him, but how can I not scare him off with my indecisiveness?

Its not your indecision that will scare him away, it's the lack of a challenge. If you have learned nothing with your experiences of being a one night stand, then that's all you will ever be. Act like a booty call, and that's how the fellows will treat you. Make friends first, and hold the sex for much, much later and give a relationship, or friendship time to grow. As you see, sex complicates things, (for you at least) and once its over, what have you got?