My cat died a week ago, now what?

he was only 2, and he was my baby :'( July 4, 2008- April 15, 2011. my grandma and mom tell me i should keep myself busy and get outside of the house more. but it's hard to NOT think of him, because it feels like i lost a child. i've been so irritable and i don't know what to do now. we buried him in our flower bed right beneath the st. francis statue and a figurine of a kitten that looks like him. anyway, what should i do now? keep grieving? do something to honor him? get myself busy and accept he's moved on?