Awww men can be so funny some times. I use to have this problem with my DH. I use to go to mums for a couple of days and when we came back Dh would say he doesnt know me or love me...I say yes he does its just that he has been with me all this time. DH go over it when Callum got older and really reconized him. DH has his time with him. When he gets home he baths him and plays chasings with Callum. Its there special time.
Good luck with your DH.
It will pass believe me!!!