1) That's all the endings implemented so far. The rest of the endings will be implemented in the next update which will be the final one giving an ending for all the girls.
2) I'm not in need of that currently, but I appreciate the offer. If you mean a 10th girl, there isn't one. The first version of the game had the 9 girls and the final will too. Each of the girls just got more content with each release.
3) No, there's not.