Help me please, idk what to do

Wew wiw wow wuw so on my birthday last Sunday I was sad because my mother didn’t greet me in the morning until I forgot what time. So I was very upset when she didn’t greet me on my birthday and I had ranted to my cousin about how upset I am. I told my cousin how I felt left out. I grow up without her and she barely send money home so I kinda pitied my father too so I had ranted to my cousin. For years I was never upset with her until probably when she start bad mouthing my father…? Well she is human and can be pissed with my father’s lifestyle but I swear shes a good person. Due to my emotional feeling, I ranted to my closes cousin about how I feel. Then later on me and my cousin went to buy some things and celebrate my birthday. My mother then finally greeted me so I was happy. Then later that evening my mother told me to stay away from that cousin (she’s been telling me that for so long saying my cousin is a bad influence and things) but that cousin is my closes cousin since birth. So when my mother told me to stay away from my cousin theres the mistake I did… I told my cousin about how my mother hate her around me. I only told my cousin because it’s my way of telling her that we should be more discreet. It hurts my cousins feelings and I wished I had thought of that first before telling her. That night she probably rented to her mother too about it because she’s so hurt. Then Monday came, I was on my way to my duty when my other aunt called me to tell me about my cousin’s mother bad mouthing my mother and things. Then today Tuesday… my mother is visibly upset and want to call me later. I’m very much anxious and would like some advice how to fix my mess.