Tips for a shy girl on flirting?

I tend to be a little shy most of the time, and get very shy when the guy I'm crushing on appears. He and I have been flirting from across the room for several months, and we've met briefly a few times, but haven't really had a good conversation. Oh, and he tends to project confidence and is quite popular.

Anyway, I know because I'm shy, when I feel like I'm being obvious about my interest in him, it's probably barely noticeable. So two questions:

1. Any tips on how to flirt with him, without my shy self feeling like I'm making a fool out of myself?

2. Conversation ideas... ideas on striking up a conversation without losing my nerve when he gets close?

Thanks! :)
Tips for a shy girl on flirting?
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