Possibly My First Gravid Ball Python Ever?

[rufretic]

This girl is still spending most of her time on the cool side... No one knows what this means?

It probably means she has not ovulated yet and is still just building. After she ovulates she will not be interested in the male anymore and will start hanging out on the warm side to start cooking the eggs. As said before, building can take a long time, be patient. Just continue to introduce the male once a month and keep an eye on her. If you witness an ovy or notice she’s on the warm side then your probably getting closer but for now you may have a while to wait still.