I’m not sure if I’ve ever fallen in love with a completely imaginary dream person, but I did dream about my ex once years and years after we broke up. I don’t remember what I dreamed about exactly, but I do remember waking from it. The happiness fading as the realization set in that it was all a dream – I was by myself in bed and none of it had been real. I’m usually pretty good at dealing with solitude, but that moment… that was the most intense loneliness I think I’ve ever felt.
I have a few of those, and while the ones I bought have worked out fine so far, I think it’s worth cautioning people that they are annoyingly loud doing basic operations.