How can I get rid of a fat fat and double chin?

I'm 13 and my face is huge. If I put my fringe back my face is really unflattering and I'm fed up of it. I'm not that fat, infact I love my body. I'm 5'2 and 8 stone. If you think that's fat, then what ever, because I've seen fatter. Anyway, enough about my body; how do I get rid of face fat? And I'm starting to get a double chin, which I'm not liking at all! So how can I get rid of them? I eat quite healthy and although I'm not sporty, I walk a lot and do sport at school, so I think I'm in quite good shape, and the rest of me isn't fat so how can I loose my face fat with out going on a diet or whatever?