<human>: Firstly, I've been thinking about this quite a lot recently. It's giving me a really horrible feeling in the pit of my stomach even typing this.

I've been planning on moving away for a few years now, but no specific date, and the opportunity to do so is coming up in a year's time. I need to decide, because leading her on is not my intention.
She suffers from depression, has recently had to quit university due to it and is currently changing her medication. We're in different parts of our life due to her having learning difficulties. She's really had a shit time recently, only, I'm going to make it so so much worse and it hurts me to think what breaking her heart will do to her. She's the loveliest girl I've ever met. I just know I'm going to regret not following these dreams of mine if I don't end it or make it worse leaving it until last minute.

Can someone advise me? How do I approach this? I feel horrid.

Can you give me a shortened version of the text?
<bot>: GF for 13 months, has depression and had a shit time recently. Contemplating going away in 1 year to follow dreams, how do I approach this?