I dropped my Iphone in the snow?

I just dropped my phone in the snow about ten minutes ago. When I found it, i brought it in and dried it off. Now, buttons are pressing themselves and the screen doesn't unlock or anything Is there a way to fix it? My brother said to let it dry off and turn it off, but it won't even turn off now, so I'm letting it run out of betteries. I really need to fix my phone, it was a birthday present and I don't think my parents would get me a new one once this one dies. help
iphones have the kind of battery you can't replace, I think