I've forgotten how to flirt. I'm really lost...

So my girlfriend left me for another guy 2 days ago and we had been dating for 2 years. But now another girl keeps talking to me and I think she's interested. But each time we talk, the conversation always dies out. So, I'm embarrassed to say, I've forgotten how to flirt and how to find someone else. So for my sanity and for the gaping hole in my heart...Help
I've forgotten how to flirt. I'm really lost...
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