Amazing story, and I am happy for the both of you.
It's no surprise you would expect some initiative from K, afterall, it gets a little tiring if you're the only one initiating and it feels like you're the one asking for things to happen, and there's no room for you to be passive and let him give you what you are looking for.
Like others said, perhaps K is still going through the phase and I believe he needs time, and perhaps he would stay passive forever, but that does not mean he doesn't love you the same way as you do. It just feels that the effort doesn't come two ways. Perhaps he fears rejection or do not want to be seen as someone who is clingy.
Trust and patience, and time will give you the solution you need to make things work for both of you!