M.G.
I'm sorry to hear that.
Right now, if it was fairly recent, is probably a hard time for families if they are grieving. I'm sure you are going through a rough time.
Your mom might be trying to do what is best for you and giving everyone a little bit of space. She has your best interests at heart.
If you need to speak to someone - a school guidance counsellor, a trusted adult, an aunt or uncle, a grandparent, or a pastor etc. may be a good resource to run your thoughts past. They can always reach out to your mom.
Sometimes there is more going on that we know and I am guessing that is what your mom is thinking of and perhaps trying to navigate. Talk to your mom. We do not know the circumstances. Best to you.