I think BOTH Freia and HowrseGirl have great comments, considering your age.
I would add, as well, that you are at a very good time in life to really consider WHERE you want to BE with your riding in say, 5 years?
Do you want to show (or keep showing if you already do) very competitively, with an eye towards upper-level riding, such as perhaps the Olympics one day?
Or, are you planning more towards becoming a casual horse owner who gets pleasure from simply being with your horse(es) and "hacking" for fun and to improve your horsemanship?
Or, do your plans lie somewhere in between on that continuum or BOTH?!
If you START looking at where your short and long-term goals lie, then it will help both you AND your parents (while they are footing the bill) place time, energy, and money into the area that will get you the farthest along toward your ultimate goal.
You are still young to decide FOR CERTAIN what your long term goals are, but I'd bet that you will be happiest (& with your time/mom & dad's money best spent), if it is all at least AIMED in the general direction of where YOU SEE YOURSELF over then next five years!
Just something to think about...it's exciting that you have so much life ahead of you and can pretty much "go for" WHATEVER YOU DREAM at this point!! Make good use of it, girl! ;0)
"The argument from intimidation shows nothing but intellectual impotence." Ayn Rand