I have a problem and I'm not sure where to go from here

There I was, standing next to my car, while he thumbed through an old mechanics books I had in my backseat. "So it's a no," he jokingly asked. I confirmed the no and was thankfully rescued by one of his supervisors. As I was driving away from work it occurred to me: I just rejected a seemingly decent guy based on the premise that I do not date anyone I work with. But the real reason?

I am 30 years old, single and terrified of dating/men/being in a relationship.

Today = Not Great

I am 30 yrs old and I haven't had a boyfriend in a long time.