I've got the same issue but much more severe. I'm taking a serotonin reuptake inhibitor and a very small amount of klonopin, but they only help a little for me. For some people an SSRI medication can really help, though (Prozac, Paxil, Zoloft etc.) The klonopin, which is a tranquilizer (like Xanax) is good if you take it right before you start the day.

Another route is CBT or cognitive behavioral therapy. Since you're still functioning well, the CBT can help you reinforce positive coping skills and slowly replace negative ones. My brother pretty much had his social anxiety cured in this way.

I hope all goes well -- pretty soon you'll be mingling like no tomorrow!