i am so sorry for your loss.
Its a real double edged sword isnt it.
I want to be realistic in my answer to you - so, yes, i think that some sense of loss will always be there. I think that it just starts to become a little easier - as in it's not the first thing that you think of every day.. soon it will be the second, then the third & that's when it starts to feel like the fog is lifting. The thoughts, feelings are always there & good & bad days will always be there & soemtimes, it will catch you off guard, many years later.
We lost a twin 13 years ago & i still wonder about the what if's & how different our lives may have been, but i dont dwell on it so much now - i try & focus on how blessed we are to have the 2 amazing children that we do. We dont & will never forget & it still hurts, just not as much anymore
I hope the fog lifts for you soon xx