He has become emotionally unavailable and also he is making it clear with his actions that you dont matter that much to him. Any complaining will be water off a ducks back, as he doesnt plan to change and just wants you to stop mentioning it.
Try looking at this:
[http://peterfox.com.au/family_fusers_isolators.htm]
Also, I remember Abitwobblynow on here saying that her counsellor told her that:
"when men are EMOTIONALLY UNAVAILABLE they will often ARRANGE their lives around distance: work (merchant banker, pilot, oil rig, ex pat, long shifts, you name it) relationships (porn, internet chat rooms, affairs, involvement in the kids), long and involved hobbies, sports, committees, anything that keeps them AWAY."
This sounds like your h to me , from what you have said.
It is a shock for many of us to realise this, as it is usually presented as something else.
You know that you only have two choices, though. One is to accept it, and plod on. The other is to change yourself.
This isnt about you being too clingy, I doubt you are. You need to have a clear conversation with him telling him what you have noticed and what you believe. And also, what you are willing to live with, in order for the relationship to continue. If he isnt willing to change, or says he will then doesnt, then you have to take action.
I didnt need to leave my h, but I was certainly going to at the end, and it did shock him into changing his behaviour, and our relationship is now on a far more equal footing. I am quite sure that if I had been playing at it, it wouldnt have worked out.
Or maybe insist on going to Relate, or similar.