Hi A.,
You are going to get a lot of responses from people saying "No, babies don't need to feed at night, growth spurt or no, just let him cry!", simply because that is what they choose to believe. Frankly, I don't know - I haven't this medical knowledge, and I don't really know if even most pediatricians would know this, since it hasn't been researched much. On the other hand, I feel sufficiently qualified to say: "follow your instinct." You and your baby are the best people to work out what your needs are. You obviously have a very good ear for hearing what your baby is telling you, and I'd trust that. If you think your boy is no longer needing night feeds, then you can respond the way you feel appropriate. I am a co-sleeping mother, my son is 19 months, and I'm very happy with that. I like to give him the comfort at night although I don't think he physically needs it. Co-sleeping also allows me to get plenty of rest. If you don't think your son needs that particular kind of emotional support, that's good. You might find, though, that as he grows older he needs it more, especially with you being away working part of the time. I am sure you will figure out just how much night crying is acceptable. If it goes on too long or he seems too upset, you can always try something else!
Hope this helps!