How are you in a band with tons of social proof and you're tripping over a divorced woman with children?
Something ain't adding up. I read you entire post though so here's my take.
Smoove's Protips
~ Never write a post this long about a single mom
~ Don't ever talk about the status of the relationship. There was no need to clarify that the relationship would be casual. Let her ask about labels and shít
~ Stop trying to analyze every little thing. She told you 'she learned a lot about you' and your asking us what it means. It means she learned a lot about you.
~ Use pet/nick names sparingly. You don't need to be calling her sweetie, babe, or sugar booger everytime you address her. Nicknames are more endearing when used occasionally. They lose there steam when they replace her name.
~ For someone in a band, the descriptions of your interactions sound mad awkward. Why are you biting this chick if she isn't into it. You need to be able to gauge if a woman is into this stuff.
~ Don't call 'this' PUA. PUAs died in 2007 and this isn't a PUA site anyway. Here, you will learn the ways of the don juan - the king of improvement.
~ Read the book of Pook, The Black Flag by Shark, 48 Laws of Power, The Rational Male and The art of Seduction
Edit: Oh and NEVER fūcking apologize for kissing someones ex girlfriend. He doesn't own her or you. You can kiss/do whatever you want. Im actually surprised she still fūcked you after this. I thought her ghosting would have started after that. Tsk tsk. Single moms.