Glad you're being upbeat...
Also, she hasn't told me to shut up about discussing boundaries yet. I can tell she finds it mildly annoying, but understands it's necessary.
Wait, what? You signalled you wanted to ask her out, she said she had a boyfriend, and... I guess this is when you told her you're poly, she said she's not... Maybe I'm missing something here, and granted, I'm not poly, but I hardly see why this calls for a formal discussion of boundaries, any more than her saying she wasn't interested in dating you but would like to keep being friends would.
I myself have never had a notable interest in someone already in a relationship, so I guess I don't know what it's like. All I know is watching the first two seasons of Smallville and wanting to throttle Clark until he straight-up asked Lana to dump the jock for him already.
('Course, he knew for a fact the guy was a dick...)