Sorry you have endured some of the 'humour' that some people post on here - their sensitivity gene got surgically removed somewhere along the line.
It sounds to me as though your husband is in the early stages of depression - probably brought on by the pressures of overwork. In this situation, it is easy to loose your libido, and with it, the feelings that your relationship is still worthwhile - hence his 'love you but not in love with you' stance.
You really do need some counselling, and salla's advice is sound - as uisual.
In the mean time, keep talking to each other. Nothing heavy, just keep on chatting away when and where you can.
Try and go for a walk, hold hands, and just see what happens with a little fresh air, and no immediate pressure to be somewhere and do something.
This marriage is certainly salvagable at this stage, so don;t give up!
It is difficult, but not by any means unique. Give him al the affection you can, but no pressure at all to return it.
Keep in touch - we have a way to go, and if the 'humourists' butt out, you can get some support on here.