I think you need to stop doing things that make you think of her.

I really think you need to see a therapist. Normally I do not suggest this, but your attachment is a little extreme. If you need help finding a therapist, or finding programs you can qualify for, post here. We'll help you find something. However ruminating constantly on her is really detrimental to your health. You're worrying about something that is in the past and its time to live in the present again.

Are you taking any medications? Are you seeing a therapist? What are you doing for hobbies? What are you doing for fun? Are you ever leaving your house?

The chat here is filled with people who are compassionate. Click on the "Chat" button and then hit the door icon after it loads. Then pick a room with people in it. Maybe they can help you take your mind off of her. (Sometimes I am in there too!)