Lythius, I am awfully sorry about your loss; it seems the two of you had a very fulfilling relationship. It's a big loss. And one to be grieved. I think sometimes it's best not to focus on 'getting over it', rather allowing oneself to grieve, permit yourself to feel the sadness, and feel it for as long as it needs to be felt.
Do you have another friend you can spend time with? Someone to talk to about your loss?
What was the nature of the breakup? Did she give you an explanation? Is there a chance of repairing things with her?
I can hear your pain.
Come talk to us, we are here for you.
Take gentle care,