K.S.
Parenting is a 24/7 job and joy. Why would someone actually ignore their child just because it's night time? And, since when is taking care of your child when they need something a bad habit? If he is waking, it is more likely that he needs something. Even if it is just to feel mom near him. My daughter didn't start sleeping all night until after 2 years. And, even at almost 3 years, she still gets up sometimes. Can you start with a cup of milk and over time dilute it until he's on straight water? And, even though you are giving the Motrin, it still may be his teeth. Just because those bottles say 6-8 hours, doesn't mean the meds actually last that long. It could be starting to wear off and he is getting uncomfortable. This will pass, it just make take a little longer.