I think I know what you're talking about. I used to to get the same sort of feeling when I started hanging out with people on a more large scale. I just called it social exhaustion, and it really comes from the point that you're getting some personal satisfaction from meeting people... but for making yourself feel good. (which is cool mind you.)
Though you're most likely farther down the path of seduction then me, I can still provide a little insight here... people are like marathons, the more times you run them, the more you get used to it. It's just an exposure thing... but if you don't want to believe that, then another thing is ask yourself "do I care at all for these people"? Probably not, and listening to a bunch of peoples opinions on what to get your kid sister for her b-day can get old... FAST.
Keep it in mind.