Oh VR - sorry to hear of your ups and downs. What can I say... other than to empathise with the difficulties you are going through.

Relationships can have a strange magnet like dynamic, and can often end up with "push me, pull you" effects. One pulls back, the other steps forward etc. Perhaps if you really step back and focus on yourself, and your life and try to enjoy time with other people, you own interests etc, she may have the space to look around and see what a great thing she has! At the very least, it may take your mind off the sadness you have been going through.

I hope my feedback isn't out of line. Just my personal thoughts, ignore if it doesn't apply...

All the best