why is it so hard for people to get over graham's death?

There's absolutley nothing wrong with missing a character, just like there's nothing wrong with missing a real person. So what if there's more important things to worry about, a loss is a loss and if people still want to miss him let them. Because I know I sure as heck still do. It's not like we can't still miss him and care about the other aspects of the show.

Some people have strong attachments to characters that you may not understand. Some connected with that characters in particular ways, others just really felt for him. A lot of us feel he got screwed out his chance of a happy ending. The fact that a selfless act of sparing Snow White would lead to he's eventual demise just doesn't seem right. We wouldn't even have a story if he didn't let her go. Not to mention the guy was a prisoner a full year earlier then everyone else.

I never understand why this bugs people. If it turned out Belle had really been killed in 1x12 it wouldn't bother me if people still said they missed her. Let people miss who they want to miss.

There are those of us who strongly believe that Graham is Emma's one true love. Because of it, we cannot just "get over" his death. We want him back! He and Emma belong together!

For one, because I still cannot believe that Emma got over him so quickly, since he died in such a dramatic way. Besides he was clearly one of the good ones.
And on the other hand, because he was real eyecandy, and had a sexy accent. Superficial as it is, but that's why I miss seeing him around.