If she's not there/available, there's not a whole lot you can do? Yes you miss her terribly, yes it's very hard, but she's not there/available! The only way out of that closed circle is to look toward something outside it (when you will see her again) and form a bridge to it (journal? draw? get X number of candies and eat one a day?).

When my T would go away for a couple months, I'd start a "special" journal just for that time. Once I decided I was going to record, in one sentence or less, THE most important thing I had learned that day. So, I took a piece of paper and wrote the dates from "today" to the day my T would be back and then filled it in as I went along, each evening after the day was over. It was kind of fun trying to figure out what I'd learned that day, remembering the day and realizing how I'd lived through it pretty well, etc.