Good Question,
I'm not a therapist so don't take this as the gospel truth, but from my background in psychology is here is my off the cuff answer:
Fear is laregely conditioned. How do I know this? Because Watson took an 11 mo old baby (lil albert) who was not afraid of rats. Just as lil al went to touch the rat, Watson made a big, loud noise that made lil al want to poop his pants. Watson repeated one more time.
A week later lil al was scared of the rat. In fact, his fear of the rat had generalized to rabbits and other such creatures too.
This conditioned can work in the other direction too as discovered by Mary Cover Jones. You can remove fear by presenting the fearful stimulus in a way that is only mildly threatning and then systematically progress the encounters until the fear is gone.
WHat will (likely) not work according to a huge amount of experiments:
a) You can't FORCE the fear to go away. You have to allow it to happen and not fight the process.
b) Placing yourself in a level 10 anxiety situation will not make the fear go away, but wil instead increase it.
c) Avoiding the fear will not make it go away.
d) refusing to get treatment for other associated mental health problems such as depression, panic, etc. will increase the difficulty removing fears.
What will likely work:
A) Reducing general stress. Meditation, exercise, healthy diet.
B) Facing your fear in a reasonable manner. If trying to go for a full close gives you the trembles, then try something like just going for a kiss close. I don't know where you're at, it has to be something that causes you mild but not terrible anxiety to progress. But like lifting weights, you do need to continue to push forward a little bit each week and be consistent.
C) Stop musterbating and shoulding all over yourself. Outcome dependance will increase stress like a mutha %^**%. I know successful people who should be happy but walk around tense and rubbing everyone they meet the wrong way becayse they are constantly thinking about all the stuff they *must* do. I suggest releasing the outcome of the interaction and instead place the focus on what *you* will do and forget about trying to control peoples' reactions to your actions.
D) Remove irrational fears. Examine your beliefs and see if they are rational. Is there really anything to be scared of? What would really happen in the worst case, I bet you would still live and carry on, wouldn't you?
ALl of these things do take a little time.
Immediate bandaids:
Xanax: I think this would reduce physiological symptoms for a couple of hours after ingestion. It unfortunately also makes some people tired and may reduce your performance. If taken in heavy doses it may also prevent desensitation because you're not really overcoming your emotions this way.
Breathing: You can try some deep breathing techniques. I think you can find descriptions of these in any basic yoga course.
Visual: Visualize things going well in the morning before you leave the house or just before an approach.
Glucose, Thyriod, etc. there are various medical issues that could increase your sensitivity and physiological symptoms. It's always a good idea that have blood worked reviewed now and again at any rate.
Anybody's guess stuff:
Kava Kava: Rumored to reduce anxiety and promote relaxation. It has been linked to severe liver problems and death. You can purchase at health food stores in the US. The studies of its efficacy have not well controlled. Studies extolling the benefit of Saint John's wort, including one US university study, were recently debunked. I am equally skeptical of the studies claiming Kava Kava has anti-anxiety benefit. Might be worth a shot if you can afford a spare liver =)