J.K.
It is normal for your little guy to be standing in the crib. The problem with holding him while he goes to sleep is that he isn't learning how to put himself to sleep. So when he wakes up in the middle of the night he will not be able to go to sleep easily.
http://www.amazon.com/Healthy-Sleep-Habits-Happy-Child/dp...
I recommend this book Happy Baby, Healthy Sleep Habits. The great thing about this book is that it shares there is not just one way to help a baby sleep but it gives you a variety of different choices.
Hope this helps. I have a 20 month old and I waited 9 years long for him so I totally understand the desire and need to hold him. However, I know from my 11 year old that learning good sleep habits is so important.
Blessings!