Oozing people

Ever know someone whose life magically seems to ooze over into yours? You know, I like being friendly and helpful, but when my life starts revolving around what I can do for them (usually for free) on a daily basis, a line gets crossed. It's a very annoying line...mainly because you have to find the very fine line between going the extra mile and going the extra 15 miles (or otherwise supporting them at the cost of your own productivity).

Sorry, just needed to rant.