Sure, I might as well add my sob story to the list...
I had a serious girlfriend, many years ago now. We talked and talked about our lives after school: what we would do together, how we would live, what kinds of jobs we could get and when... generally building our lives from scratch. It wouldn't be easy and we knew that, but we were going to do it together. Our relationship was the kind you read about in fantasy stories. We completed each other in ways even married people only dream about. We were close to the point of having the same dreams; writing our stories only to come show each other in class and laugh about how similar they were. It was as if we were meant to be.
One day, her dreams showed her images that frightened her gravely, images I have to assume were about me and the children we might have together. I never saw them in my own, and she chose not to write them for fear of driving me away, but I could tell it was slowly eating away at her. I did my best to assuage her fear, but everything I did only seemed to confirm her prophesy. Within a few short months, she had changed her post-graduation plans, choosing to pursue her career at a different (admittedly better) school than we had planned. Despite this, we still loved each other deeply and continued dating for several months after graduation. We kept in touch regularly and continued sharing our dreams and stories online.
Then, all of a sudden, nothing. She utterly disappeared, as though she had never existed... no letters from her, no phone calls, no messages... I couldn't even reach her in my dreams. I assumed she was as busy as I was at school, but kept her posted on my goings-on - as often as I could anyway - just to remind her that I still loved her and thought about her often. This went on for about three months; I was overjoyed to finally receive a piece of mail from her, a greeting card based on the fancy envelope it came in. My elation and my heart slowly died as I read the contents of the envelope... it was a picture of her happily walking alongside a dark-haired man I never knew... and an invitation to their wedding.
After that it was a small string of non-relationships with women who cared more about the car I drove than anything about me, or who were batshit insane... usually both. Now I've pretty much given up. I know that love exists, and there is someone "out there somewhere", but I'm certain I'll never find her.