What is the name of this movie where a older man starts to write to a boy in a foreign country about his life. And he's talking about his wife and how he can't stand to be around her but then when ase dies he gets really sad?. I know its not a good description but that is all I can remember. If someone knows what movie I'm talking about PLEASE TELL ME!. thanks :)

I think you're looking for "About Schmidt' - here's a snip from the plot off Wikipedia that goes with what you have described:

One evening, he sees a television advertisement about a foster program for African children and decides to sponsor a child. He soon receives an information package with a photo of his foster child, a small Tanzanian boy named Ndugu Umbo, to whom he relates his life in a series of rambling letters.

Here's some more, from IMDB:
About Schmidt (2002) - IMDb