So you mean he was being over-attentive while away, and not so much when he returned?
Well, this seems to me a pretty natural thing , don't you think??
Especially after 4 months, you can't expect him to be as attentive as in the first days, can you? You're lucky enough to have got all that attention in the beginnings, but it's only natural that, as your relationship becomes more comfortable, he will not feel the need to prove his affection as much/as often. that does not mean he doesn't love you as much, on the contrary, it proves he's comfortable enough with you not to have to make too much effort.
In my opinion,I think you definitely are being too demanding. Well, only if I understood the problem properly, obviously...lol