I miss not-my kitty

So our neighbors' cat adopted us about a month ago. The neighbors said she was afraid of their new dog, and she started hanging out in our yard basically all the time. After some emailing with the neighbors, which suggested they weren't going to do anything, we pretty much accepted she'd be our yard cat for the foreseeable future. I have never known such an affectionate cat! Every time I stepped outside, she would come up to cuddle. She'd snuggle in my lap and purr, and even follow me on walks down our (very low traffic) dead-end street.

Then, night before last, the neighbors came unannounced and got her. We didn't realize this till they emailed later. They had previously mentioned something about taking her back to the farm she's originally from, so maybe they did that. Anyway, I really miss her! I got very attached to her. It almost feels like having a pet suddenly die. Our yard is so empty now.