How to get better style? (skateboarding)?

I have been skating for about 8 months now. I can BS flip, varial, kickflip, nollie, pop shuv, nollie fs shuv, fakie big, both 180's, and a bunch of other stuff. I can also ollie a 6 and kickflip a 3. Lately, my friends hav been telling me that I have terrible style when I am skating. They always tell me I flail my arms like a bird when I skate. And now that they have told me, I have caught myself doing it alot. I usually flail my arms most when I am skating vert, or doing stuff that involves ollieing up like manual pads. I have tried to stop, but I always seem to do it without noticing, and it looks really ugly. How can I stop my arms from flailing and get better style?