I would describe it as such: I spent a good two years trying, failing, doubting the whole process. I also treated it very much like a scientific experiment and not a relationship and never really connected with Mika. After so long of that I just straight burned out and stopped.
Then I wrote. As it happens, I wrote a highly personal, cathartic story, in the first person, and what was a romance subplot became me being very, very attached to a specific character. After about three or four months of straight writing about that character I realized not only did I straight love this being I considered a figment, but that they were capable of autonomy at the slightest provocation. I actually put them aside to prevent them from becoming a tulpa until much later, when I decided to make them my second tulpa after bringing the first back.