I've heard this from many people and felt the same way too. Upon analysing the situation I've realized that as soon as we step into the plane to go to a foreign land, we put our homeland experience on pause and press play with our new found land. We experience the new land, learn about it and try to assimilate our lives while we are there.

Few years later, we come back to our homeland and find that our homeland has changed a lot. Even though our own experience of homeland was put on pause, the homeland does not pause. It keeps moving on. So what ends up happening is that we do not find the homeland to be the same homeland we left it few years ago. Subsequently we are not happy neither with the homeland nor with the foriegn land, because we seek the same homeland we left in the past.

So as soon as we step into the plane to go abroad for studies or work, we create an island of our own. We will neither be here nor there. The mind wants a continuous experience and we break that flow so there is a compulsive desire to continue where we left off, which is not possible. 

Even if we do decide to go back, it seems that we have lost of lot of connections, and it's not easy task to reconnect for all the lost years with the society. It is possible with the family but not with society. The society and the nation has moved on without you.

We are all disconnected zombies stuck within our own reality of the past.

I do not want to present problems only. What is the work around? What is the solution? The solution is acceptance. Accept that you are seeking a past that does not exist anymore. You have to move on whatever you decide is the good thing for you. And you already know what it is. That's why you are still here.