I really want a horse but my parents won't get me one! Help!?

I've always wanted one but we have 1 city house, and 2 country houses. we live in NYC but we go to CT every weekend and there's a farm across the street with a very nice owner. there's also another horse there! In the summer, we go to Marthas' Vineyard and there is a fantastic stable there. My parents thought about it for Christmas but they got me other things. Pleeeeeaaaaaase help me! I love horses and I work with them all the time. I know my parents can afford it too! I give lessons to little kids and I also give pony rides.