Girl I have been there.
I had ridden for years, then one day when the idea of leasing a horse came up my mom said no can do, killed my lessons till further notice, and claimed it was for my safety.
I was so fed up of waiting on her, that I began to volunteer at a therapeutic riding center.. and for helping out, I got to ride a little.
Best decision I ever made. Course I could drive myself.
Try to have a mature conversation with her, without "attitude" or "whine" (parents always claim their kids talk to them in that way) and see what happens. Or find some place close by where you could volunteer at or groom some horses.
Maybe it just got expensive and she didn't want to deal with the cost. Keep that in mind too. Can you get a job babysitting or something?
Exchange lessons for chores?
"Strength is the ability to use a muscle without tension"