Everyone grieves differently. We all have different situations. Different relationships with our spouses, different causes of death, possibly different circumstances leading up to their death. Different family dynamics. How could we all grieve the same? I don't think anyone should be telling you how you will or should feel either. You don't even know how you'll feel a few months from now, so how would they? In a group setting like that I would expect people to just listen when I open up. Maybe share with me when they can relate to something I've said. I would do the same for them. We're here to support each other and listen, not tell each other how to feel.
You are not doing anything wrong Tweety.