Well, I can only say that it's hard sometimes. Some days are harder than others. They put it really well in the movie Sleepless in Seattle:
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Doctor Marcia Fieldstone: People who truly loved once are far more likely to love again. Sam, do you think there's someone out there you could love as much as your wife?
Sam Baldwin: Well, Dr. Marcia Fieldstone, that's hard to imagine.
Doctor Marcia Fieldstone: What are you going to do?
Sam Baldwin: Well, I'm gonna get out of bed every morning... breath in and out all day long. Then, after a while I won't have to remind myself to get out of bed every morning and breath in and out... and, then after a while, I won't have to think about how I had it great and perfect for a while.
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Grief is one of those things that comes in waves...each wave may be a little less intense than the one before, or maybe it will be longer between them, but they come and they touch you. I think forever.