WARNING - MOVIE SPOILER
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Winry wasn't the type to just grieve over the loss of a close friend and an even closer friend, (not that they had actually died, but they might as well have) and she knew in her heart that if she just spent all her time weeping over what had happened and getting nothing done they would have been furious. She knew she had to get on with her life, no matter what it took.
So that was what she did. She got on with her life. She went back to Rush Valley to learn even more mechanical tricks and tips, learning even more complex and better working designs for automail. And she was happy, most of the time. But she had brought her memories with her, and even getting on with life couldn't completely ease the pain of having lost the one you truly love...
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Ed had been through so much that by now he knew well that stopping to cry over the loss of friends would be pointless (not that they were dead, but he would truly never see them again) and he knew how mad those friends would have been if he did just that - one of them certainly wouldn't balk at throwing a wrench at his head. He knew he had to move on, to find some other way to make a life of his own.
So that was what he did. He made his own life in this other world. He and Al became drifters (they'd done it so long, it was hard not to drift) who went all around the country doing all sorts of things, never staying in one place for more than a month or two. But even moving constantly couldn't help him to escape the pain of knowing you'll never see that special person again...
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Random EdWin drabbley-thing. Shrug. It just kind of came, after I watched the movie...
WAH!! SO SAD!!