But I have to say that most people won't do that as they cannot or rather have very poor control over their emotional feeling and needs.
I still remember the days that I have poor control, which has caused some problems. However, i still feel that the process could be learned if you two are trying very hard. Although I wasn't given proper chances, I managed to be friends of two of my ex, we still keep in touch, talk about our life plans, send gifts to each other, write post-cards and sometimes call to say hi. I even got a wedding invitation from one of them.
The only obstacle for that not happening is that you guys give up trying or the feeling's still there and one fails to accept the fact.
Anyway, I strongly feel it's a very good learning experience as a lot of westerners can do that but why not us?
The only reason I can think of that not many Asians can is that we don't have many chances to try or we don't try at all just like my other exes.
Nevertheless, even if you decide to try, I have to warn you that the process is very TOUGH. And it takes 2 persons' effort, not only you, to make it work. Your ex better have the same perspective as you do. Otherwise, it's a sure failure.