I May Act Like I Am Not Sad When I Really Am Sad

I'm trying but I'm not too good at it so I am trying to stay out of everyone's way. :'( My dad didn't make me go to church today but that meant I was home with my stepmom and I hid out in my room and worked on a painting.
My neighbors stole my precious puppy 3 days ago, and when dad tried to get her back they acted all snotty about it and refused to let him have her even though we saw him take her. He just kept saying come back with a search warrant and laughing. Then he shot Bella and threw her back in our yard. 😭 😭
Yesterday dad bought me Sadies cause I kept asking for an English bulldog since I was little but my parents always said they are too expensive but now I don't really want her cause she's not Bella and I don't know how to make him understand why I am not happy with her so last night I took her to my room but I don't like her and I feel angry with her cause she isn't Bella and I'm ignoring her. This morning I let her out in the yard with our other 2 dogs so at least the other dogs won't ignore her and my stepbrother fed her bacon. I hate pretending to be happy about a puppy I don't want when what I want I can't ever get back and I feel bad for being angry at Sadies when it isn't her fault and she's a sweet pup.