How can I ask out/attract this girl?

There is this girl I know who I really like and want to date (we are 15). We are both on the same sport team and we know each other pretty well.
I know sure she likes or used to like me. I need advice on how to ask her out/ attract her without weirding her out resulting in telling her friends. I do also know some of her friends pretty well.
Should I start texting her or in person and what should I say? Any advice is great thanks!
1 y
She possibly has interest in another guy.
How can I ask out/attract this girl?
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