Disloyalty and Severed Friendship

Greetings...

it's been like 8 months after a friend i used to care out of the blue severed all communication channels with me. With no reason. Despite its been a long time, it takes me too much time to digest the situation but anger remains with that situation and I feel like i need to return the harm.

I feel betrayed since everything was good, but without any word or reason she severed all communications with me. That made me very sad, after all the support and gratitude i had with her i feel devastated.