Don't try and force any emotion on yourself. Feel what you feel. It's ok. No one grieves the same. However you do it is the best way for you. Don't push it away. It helped me to say, "this is what I'm feeling right now." Give it a name. And ride the wave. The kind of grief I find particularly difficult is grieving for a family member while their body is still there. It happens sometimes with old friends, where the person you know isn't there anymore. It forces you to recognize what you used to have, and it's sad. Don't hesitate to remember the good and the bad. It was all part of who they were.