I think you're handling it as best as you can. you sound very reasonable. you know to play by her rules and you know you will be out of there soon so you have that. I know my mother was confused by me, my depression (though I wasn't diagnosed at that age) and what I was into. she'd listen to my music, looking for "hidden messages" as to why I wasn't "normal." thing is, those thing weren't the reason, they were the reflection.

I was going to suggest therapy with her and you, but she sounds a lot like my mother. my mother was from the generation that if you saw a therapist or needed meds, well you were CRAZY and not normal. I doubt your mother's as old as mine, but I'm guessing she's not going to be open to therapy...

Perhaps someone else has something better to say. I just wanted to tell you you're handling it well. Keep calm and carry on. Best wishes to you!