My best friend died on Saturday?

i just found out today by my teacher. My friend had leukemia, i did not know she was going to die. We had a big fight before she died, I feel like an idiot. how can i get over this horrific loss. Also today when i found out i could not stop crying.I feel exactly like jess from bridge to terabithia. do you know how to get over this. cause i don't. I actually found out my parent where lieing to me they found out the day she died. I am only 14 years old help me.