Dude, actually I had a similar (kinda) experience to this. I didn't take it as far as you did, though, and I stopped it before I could really piss her
off or let it take over my life or anything. And mine was only on FB and Myspace, and it was a girl I had actually met and half-dated.
Pretty much, I worked with her for like a year. She had a husband, but she flirted with me a lot. I was young, maybe 20 or 21, so I didn't know how to
really handle it. But pretty much in the end, I'm pretty sure all she wanted was sex. In my mind, I thought she was "in love" with me, and I kept
trying to convince her to leave her husband and #. So yeah, it progressed from that, to creepily stalking her FB/Myspace, thinking every post she made
was about me. After we got laid off from the place we worked, she helped me get a new job at the new place she worked. At the new job, she flirted
with some other guy and I got all depressed.
Long story short, during all that time, I guess the evolution of my behavior was so gradual that I never really noticed how creepy I had become. But
eventually I ended up realizing how f'ed up I was acting. And after that 2nd job laid us off, I just kinda..dropped it. Just like your story, at
first, she reciprocated the flirtation, etc. But after the creepiness started, she lost interest.
Please just make sure after this situation of yours is out of your head that you don't become involved with anything like it again. I've learned from
my little episode, and I'm sure you can too.
Also, drugs/alcohol enhance this type of behavior, at least they did for me. Maybe take a break from those for a while.
Peace, good luck man.
EDIT: Also, I kinda researched it for myself back when it was going on, and the best I could come up with was:
A delusion in which a person (typically a woman) believes that another person (typically of higher social status) is in love with them.
Hope this helps.
edit on 2/21/2013 by banandar123 because: Added something.