Help, I feelin guilty?

My frand and I were playing bball. I was up 2 points and we had to go (parents were like gtg). So my frand hit like basket from 10 feet away and was like thats 3 pointer i win. I said no not fair no 3s. He ssiad yes went home. I was real mad. So today I went to his haus. When he in bathroom, I killed his cat with bootcher knife. I ran home. He has called my haus 10 times but i keep hanging up. I feeling guilty wot do i do? plz halp