Is he trying to make a move?

Is it appropriate for a married man to say "hey let's order lunch" with single female at work? Keep in mind he gave me a free birthday lunch after only knowing me for 3 weeks now it seems he wants to order lunch indoors here or there? He's been kind of flirty with me but nothing too bold. I just wanna know is this normal/friendly or is he trying to make a move soon? We’ve ordered lunch together before, but we didn’t sit together and eat, which I don’t understand the purpose.. I don't date conworkers or married men so am I crazy for thinking this ain't normal? He doesn't get lunch with any other woman at work

Is he trying to make a move?
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