@linipain,
Yes, like Jespah I was going to ask about what sorts of conversations you had about this before you got married, if any.
In re-reading, I noticed the sentence "keep promising that soon we will plan our own kid." So he has been telling you that he wants a kid, just not now? Is that right? How long, if so?
And do you know what his resistance is? There might be some sort of external circumstances that are changeable -- for example, maybe he lost his job since you got married and doesn't feel like he can support a child. Then you can address those concerns and maybe get somewhere.
But if there isn't a controllable factor like that -- if he just plain doesn't want kids and you really do want kids -- then it's probably time to establish that and move forward.