The showrunners said from a very early point that the two would not get together during the shows run
I had missed this. I’d hung five season’s worth of ship-hope on them, but I regret nothing because they’re adorable and they had better get together in the comics!!!
From what you’ve described, it sounds like she’s a straight forward and direct person, which is good. Just be straight forward and direct (but tactful) with her. Something like, “I’m sorry, I think I misunderstood the situation. I’d like to hang out as friends, but I’m not looking for anything more.” Optionally, “We can have that drink if it’s just as friends, but I’m not going to lead you on if you want something more.”