It could very well be the depression talking, at least to a point.
There is a very good chance that his emotions are in one big jumble right now and he simply does no know which emotion belongs to what or who.
Some things to keep in mind. Men and women have different definitions when it comes to emotions. In a lot of ways it is like they are speaking two different languages but yet use the same words. Another thing is that in a long term relationship "love" takes on new meanings. In the beginning there is that "crazy" in love feeling but after a while for many people that feeling changes to something deeper, more comfortable, and some would say more meaningful. During that transition it is easy, for both parties, to mistake this "lack" of being "in love" with not really loving the other person when what it really means is that the love that is felt has become something a lot more.
My advice is if you do really love him and do really want to be with him then give him a chance to work through this and be patient. Successfully battling depression isn't something that happens over night. It may take months with many ups and downs along the way before any real improvement is made.
2 confirmed herniated lumbar discs. Spinal Arthritis. Spinal Stenosis, diabetic peripheral nueropathy.