How do you get over the death of an angel?

almost 10 years ago, in Kindergarten, I met this girl named Shannon. I fell in love with her on sight, even at that young age. She clearly felt somewhat the same, because after an hour during "play time", we where talking, laughing, and I drew a picture of her. She moved after 1st grade to Africa to do some things there. I'm not completely sure what she did there, but she loved it, whatever it was. Something to do with Animals. Anyways, I saw her twice, over summers. This February, I got a call saying she got into an accident and died. I was devastated, and didn't show anybody for a long time, until my friends saw something was up. I cried until I thought I was blind, and now after 4 months, I'm still having a difficult time with i. Even the word "death", makes me flinch, and II can only really talk about this with one maybe two people, both of which are dealing with other things right now. I keep saying "I'm getting over it", but the truth is I'm continuously writing poetry, listening to music, and otherwise engaging in activities to honor her and remind myself of her. I've woken up in the morning depressed, unable to stay focused, and I just yelled at my brother for commenting on it, despite the fact that he has no idea what it is. What should do about this? Is this unhealthy? Is it normal? Should I just leave it alone? Thank you.