Believe it or not, many children self wean to an extent when breastfeeding just doesn't fit into their "schedule": at 8 months, your little boy wants to chug down a bottle as quickly as possible and get back to what he was doing, not sit stationary, unable to look around or move his head when attached to the breast. It is also easier for him to get a full feedings worth into him more quickly from the nipple of a bottle than from the breast . Realize also that he is just starting to come into his own as an individual, and may not need the comfort of the breastfeeding as often anymore, at least not as much as you do! Its often far harder for mommies to give up breastfeeding than it is for the little one, and as he becomes more mobile and independent, the less he may want to breastfeed. Consider yourself lucky! You still get to have your bonding time when he nurses at night and in the morning, but he is confident and well adjusted enough not to need to extra support during the day. Take this self weaning as a sign of your son is happy, healthy, and feels safe and happy enough to venture away from those things he needed as an infant - this is a developmental step forward for him, and you should allow him to take it!