I'm going to hurt my girlfriends feelings while she grieves.
Why make it worse for your gf?
She doesn't understand that when you are in grief people don't want to be around you.
I understand it can be difficult to be around people who are grieving and to support them, but your girlfriend needs you now. Grieving is extremely difficult and she clearly wants you to be there for her. Talk to her and do whatever you can to help her feel better.
I'll do it.
I'm glad you are taking my advice! I'm sure she will appreciate it and will be grateful to have a partner like you!