Hoping this can be saved, but having doubts

[Maika]

The text exchange is fine. I hope you can see that she tried to make this your fault and about how you are not communicating to her - my W did that early on.

As the stuff about dogs is what I would call 'business' type communications - be proactive about those if you believe she needs to know your plans or something. But, it looks like she just needs to let you know when she's dropping the dog off, which should be straightforward.

Good that you're standing up for yourself and being assertive without being rude and a jerk - that's the balance you want to achieve: firm but pleasant.

You're going to be afraid in the beginning about whether you're ruining your chances or not. I can definitely tell you that you will ruin your chances trying to 'nice her back'. So, what do you have to lose with this approach? Nothing.

I hope you felt good about being assertive - that little self empowerment goes a long way. Now keep doing that and start building yourself up. Don't think how you feel is pathetic - it's completely normal and so many of us have been through that but come out the other side stronger and better.