L.M.
Yes, you are prolonging the inevitable. My son was almost completely weaned from the pacifier around 14 month (extremely attached but as long as I took it before he woke in the morning he only needed it at bedtime from about 12 months). My daughter didn't use hers as much and completely weaned herself around 8 months.
I would suggest letting him have it at bedtime if he asks for it or seems to miss it but otherwise keep it out of site. Then as soon as possible, don't give it at all. Some people have used the "time to give them to the new baby" if they know someone having a baby soon or "have to send them to Santa for the new baby".
My son's two step sisters were hard to wean because the younger one had one and the older one who they were weaning kept stealing the baby sisters (sometimes right out of her month).
Nothing wrong with a pacifier for a baby but the sooner you can take it after they are approaching 1yr, the better.