Is this considered a mental issue or a guilt issue...I don't know? (this is long but PLEASE read)

I always feel guilty throwing things away that my mom gave me because she is below the poverty line and she once found clothes in my closet with tags still on them and she cried because I didn’t want them. So ever since then I’ve kept everything she gave me and it breaks my heart when I have to throw something away (like an unfixable laptop that she didn’t have the money for but got for me anyway). I HAVE to throw it away, I can’t donate it and it can’t be salvaged but I know she would be hurt if I threw it away.

I recently moved in with my dad, and that adds to the guilt because I never get to see her. Also, I feel guilty because my dad plays favorites with me and buys me all sorts of things but not for my brother (who lives with my mom). I feel bad because I have a whole new wardrobe filled with expensive clothes and my brother has clothing that is 2 years old from Goodwill. He won’t help my brother and won’t even give him the graduation present he wants, yet he said he is going to buy me a car and give me money and stuff.

I just feel really bad. I feel like I am the cause of my mom’s poverty and that I should be doing something and I should feel guilty for accepting the gifts my father gives me.
I want to cry every time I think of their situation compared to mine, and how I used to live in that situation too and I “abandoned” them as my sisters say.

What can I do?

I’m sorry it’s long. I can’t talk to someone because my parents are judgmental, they say there’s nothing wrong with me so I can’t get a therapist, we don’t go to church, and I’m home schooled so I can’t talk to a counselor. I have no friends here either, because I just moved.

I just feel like crying all the time, I feel like it’s my fault.
There’s also no relatives I can talk to because they will just say I should feel guilty and that I did abandon them and it is my fault. Plus, none of them live where I live…