Hi Joanne,
If like you say your relationship is good, then may be his mind and energy are focused on this new job and his son, he may feel it's going to be complicated fitting everyones needs in at this point in time, give him some time on his own to adjust to his new routine. Sometimes when people are overloaded with demands, we will say things that just come of the tongue as a way of release. Give him time, let him contact you, no pressure. I think when he settles in to a new routine, things may be different, but he will still want to see you. In the mean time, go and do the things you need to do that may be you didn't have time for before! Take care xx