Luke, you know I am all for you speaking up about how you feel about things. Communication is key throughout this. I also don't believe the MLCer gets a free pass on their actions.
But in keeping it real with you, and as AJ has mentioned to you, it's important to be careful it doesn't become something else and I agree.
She was going to be late and she TM'd you. Next night she was running errands you encouraged her to run and let's face it, they often take longer than we think. She let you know again.
As far as those "digs", I wasn't there so I cant know how they felt. You have said she can be playful. I am not sure they were meant to sting.
Just want to be sure you are reacting in a way that is a reflection of who you are, yea?