That's pretty rotten since you DID ask her earlier today.

Seems like Mom is a little self-absorbed and should be payiing a little more attention to you. But me-thinks that her boyfriend is probably somewhat "new" on the scene, and she's enjoying his company??? Maybe if the boyfriend wasn't so "new" she'd be more willing to do things for you.
I wish I had some answers for you, but I don't. Is the school a long way away? Any chance you can walk? I know that's not cool,, but .........
Maybe next time make arrangements EARLY with a friend to take you,, huh? Parents can be a real drag. My parents NEVER took me anywhere. I had to walk or I didn't go.

And it didn't matter if it was winter either and I live in Michigan
Best of luck Krasno -- and God bless. Hugs, Lee