When the desire to be with the twin flame disappears?
The more you become in alignment with yourself, the less you yearn for something outside of yourself to make you happy. You yearn for your twin because you believe your happiness lies outside of you (with your twin). It is a hunting energy.
The desire goes away when you start realizing that you don't need anyone (or anything) outside of yourself to make you happy. You begin to create your own peace within yourself. You naturally enjoy your life without needing anything or anyone to "complete" you.
If you go down this path, you are going to see small signs that your twin will come back and wake up. It's going to behave in a way similar to your way of thinking and your path (but just a bit later than you.)
Something to learn on this journey is that the less you focus on your twin, the less they focus on themselves, and the more you focus on you, the more they focus on you.
Perhaps, it is extremely difficult to know that stopping thinking about your twin flame is a way to calm the energies between you, but it is part of your growth.
The healing you do for yourself helps you realize that your twin will come back when you are happy without him. Remember that everything you do for yourself (with the intention of becoming a better person) will benefit your twin.
Try, every time, to choose love for yourself. Try to keep believing in your journey and that your twin will be waiting for you at the other end.