What to do what to do?

So i have known a girl for about 6 to 7 years now...and recently i have developed feelings for her. I have known this girl but in recent years we have become closer friends not like a best friends forever but friends. And i would like to date this girl yet i wouldn't want to ruin our friendship. ALSO she is close friends with my ex girl friend who hates ns and the only good thing is that they are not gonna be friends next year since they are going to different high schools but ne and my crush go to the same one. So what should i do.
What to do what to do?
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