Hello Ms. LadyHawk68,
The fear (or disgust) you are experiencing is very real for you ... and apparently for good reason! You are striving for self-preservation! Certainly, if you had great feelings towards this person, and you clearly knew you were going to be in for a delightful experience, ... you would wait for this person's telephone call with rapt attention.
The physical feelings humans feel are the ones we have inherited from our human ancestors: If someone heard a rustle in the bushes, it was much "safer" to assume it was a predator than, say, the wind rustling the bushes. This is because if you made the wrong assumption -- that you thought it was only the wind, when in fact it was a mountain lion -- you would probably not live long enough to have children, and pass on those emotional traits that teach you to be "wary"!
Without knowing your past experiences with this person, I can only give an educated guess that you are in fear of your life -- either your physical life or your emotional well-being.
Please .... PLEASE ... do NOT assume his calls are the "wind rustling the bushes", when in fact there is a predator at the other end of the telephone line calling you!
Food for thought, and I sincerely hope this helps you organize your thoughts.
If it is the dude you were asking about yesterday. Answer it. Tell him he is a sleazeball and not to call again. Find someone who is exclusive to you and your needs.
He must have done something very disrespectful to you.