I feel I hate my mom and my younger siblings and I hate myself for feeling that way
Why would you hate yourself for feeling that way?
I feel like I don't even have a good reason to.
Yes, you shouldn't hate your family members but it's good that you feel remorseful for your feelings.  You should talk to someone about why you feel this way.
I'm fine. Talking to my friends and therapist should help me.
That's great. I hope your therapist can really help you out. Do you think you could invite them with one for a group session once?