Is it okay to add my barista on facebook?

I go to the coffee shop everyday for 3 months and there was a really handsome barista guy, but a few days ago I found out that he doesn't work there anymore. He was always extra nice to me, even flirting with me sometimes. I found him on facebook a while ago but didn't add him bc I didn't want to make things awkward as I would see him everyday. But now I want to keep in touch with him.
My question is would it be weird to friend request him? If you were a barista, would it freak you out if your customer FB you?
Is it okay to add my barista on facebook?
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