I was having the same debate. But mine was more sleep related as DS was waking a million times just for comfort sucks and I was quite exhausted.

In the end my body made the choice for me. My milk dried up at around 14 weeks and DS eventually gave up "trying" and self weaned. It took about a month for him to fully go -he's come back every few days to try his luck (with not much luck!) but he hasn't had any boobie for a good two now so I think it's safe to say that it's officially over.

It may or may not happen to you, but it definitely made the choice easier for me knowing that my body just *did* it. In some way I think it was natures way of saying "you know what, you need sleep, this body of yours needs to grow a baby and we don't really need the milk. We'll ditch it, eh?" I wanted to get to two too and felt a bit guilty but when you physically can't, you can't.

Maybe if you're tied just trust your body. Know that if it gets too much and something's gotta give it'll ditch it's milk supply too. And 19.5 months is a bloody great boobie journey! Doncha forget it!