She was in my class and asked for my number to help with her homework. I'm a straight A's student, she's a C student, so I agreed. We got to know each other more, but then for a week, I couldn't help her since I had my own homework to do. She texted, "Bye, f*ck you," blocked me, and we haven't spoken in 10 months. She acts like I don't exist now.