Join Date: Jul 2013
Location: Montreal, QC, Canada
Your parents are worried, and that's a normal thing for parents. Yes, it's frustrating sometimes but there's not much you can do about that. I can guarantee that one day you'll probably be the same to your kids.
I think the thing to remember here is that you need to hear your parents' side of the argument with an open mind, and not in the mindset that you're going to give a rebuttal to everything they say. Just ask them why they feel like you should only go up to 14.2, and just try to see where they're coming from and show them that you understand. That will make talking to them about this a whole lot easier than you could ever imagine.
I agree with the other posts that you're very lucky to even have a pony at your age, but at the same time I can understand that it kind of sucks that you can't do what you've wanted to do with her. Equitation9966 has a good idea, about compromising for size. In all honesty, the 15 hand range is a great size! I ride a gelding that's 15.1 and bringing him along for hunter jumper and he's doing fine. I'm 19 years old, 5'2 and not the thinnest, but not huge either so I feel you. But at his size he's plenty to get me over jumps!
As for your "friends" making fun of the size of your pony, well to be honest, I wouldn't be that keen on staying friends with them but that's just me. It's a really immature way to act, especially about expensive animals like horses. Who needs them if they need to make fun of someone to make themselves feel good?
Just make sure that you're wanting to switch for the right reasons and not because you're getting pressured to by your barn mates because I can tell you with 100% certainty that you will regret it down the road if you do it just to fit in. But we don't know you or your parents, and we don't know the whole situation so we can't really give you any good advice on convincing them. The best way to go about anything like this is to be mature and understand where they're coming from, and calmly explain where you're coming from and try to meet somewhere in the middle.
"If you act like you've only got fifteen minutes, it will take all day. Act like you've got all day, it will take fifteen minutes."