I'm so sorry. Maybe you're not ready to talk about this, and that's ok. Give yourself time to grieve, and I imagine when you get to the anger stage you will need to talk. Right now your grief seems hopeless, but please know that people care about you. I understand you not wanting to talk right now - I've lost people I've been close to and you just don't want to talk, and I imagine people around you don't know what to say.

It's OK for you to feel how you do, but don't give up on your life because his life is over. I'm so incredibly sorry for your loss. There aren't that many words of comfort at this horrible time in your life, but give yourself time to grieve. You will never get over this, but it can get better. My heart goes out to you. I will pray for your inner peace and healing, but give yourself a break with this. Your therapist should be understanding about you not wanting to talk about it, but don't lash out. Just say you need time, and when you're ready you will talk.
Lots of love to you and your family.