Yes, so very few people can say they love their job. Don't let SA make you give it up. Seek some counselling. I too have a job that demands constant interaction with people, the people who work in the same office, and people calling constantly, as well as clients that come in for meetings, consultants, etc. I cope because I know what is expected of me, it's a framework within which I operate. Perhaps you could think of it this way?
Meantime, try CBT. After all my years searching and trying, it seems to me this is the most effective way of dealing with it, short of medication, which I think of as a temporary fix anyway.
and you can always throw yourself into your work, distraction is key at the beginning of CBT. Good luck to you - just don't give up the job.
L