It's all a part of your head.

 I don't know when it began. But then, I also don't remember why it ended. If I had to take a guess, I'd say two months ago. A life separate from my own was what I started dreaming about. I lived my day to day as a contract killer, snooping, surveilling my targets and spending the nights in the arms of a beautiful woman. I remember her face. Her voice, the warmth of her body against my own. But then, I keep forgetting her name every time I wake up. Then it all goes away. Unless I write about it. I started keeping a dream journal, I tried several sleep experiments, but it didn't make sense. The results were almost non-sensible.

I read journals of scientists that experimented in the field of dreams. I cried several nights in a row being burnt out by the lack of information. I tried finding the literal woman of my dreams in this world. But to no avail, she didn't exist. No network analysis nor social media engineering application helped me. Everything points to it all being a figment of my own imagination. Is that what it is? Am I losing my mind? But then something strange happened. The dreams stopped. Is my alternate self dead? Am I forever bound to this plane of existence? There are no answers to the questions I have. I tried searching; I asked in internet forums, my questions were met by answers of people who thought of ripping me off or those who didn't understand my case at all. I bought several experts coffee thinking it'd suddenly dawn upon them the answer to my ailment. They'll begin to answer my questions out of some demonic possession. I've tried everything from Science to Occultism. There's no proper answer except this: there exists an alternate plane. Separate from ours. I need to figure out a way to get there.