Guy coworker invited me for drinks, just friendly or something more?

So, I have a bit of a dilemma and I’m curious what people think! I work closely with a male coworker, and there’s always been a bit of flirty banter between us. Recently, he invited me out for drinks, just the two of us, not a group thing. I can’t tell if this is just a friendly gesture or if he’s trying to make a move. He hasn’t really followed up with messages outside of work, but there’s definitely a vibe between us at the office.

Guy coworker invited me for drinks, just friendly or something more?
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