Met a girl once, weird to add her on Facebook?

itsweird182
So about 6 months ago I met this girl at school through a friend. We talked for almost an hour, had a really good time. We just graduated yesterday, and I haven't talked to her since. I found her on Facebook and was going to add her, but would that be weird? I figure it would be only chance to talk to her again. Should I do it? Any advice on what to say if she accepts?

Thanks!
Met a girl once, weird to add her on Facebook?
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