jusdawn
i know the feeling - was great while it lasted, but enough is enough now. anyway i got the following advice from a book and it worked for me - hopefully it will for you as well:
i breastfed my LO until about 18 mnts and weaned him off very slowly. at this point he was only drinking at night.
first i told him we are going to get to the point where he was no longer going to get mommy's milk, but he could still lie in in mommy's arms and mommy will still hold him very close (at this age it is very much a comfort thing)
so over a period of about two weeks i shortened the time that he actually spent on the breast, until he was literally on for a minute and then i would tell him it is all finished now. the minute became 30 seconds and then finally one night i said there is now no more mommy's milk. he cried of course, but when he woke up later in the night he did not even ask for it and never asked for it again.
he is still completely fascinated with my breasts though and often asks if he can sleep on my breast