How do you deal with people who are oblivious to your personal boundaries?

It's hard to explain, and I'm trying to generalise this without giving too much away,


But she has this pattern of when you say know, she will keep changing the way she words things and when you answer anything close enough she'll be like "cool, see you then"

And if you're smart enough to dodge those bullets, she'll talk to a friend or family member while you're not there and be all like, "they said yes"

I want to think that she's dumb and can't take a hint,
But I'm really starting to think that she's just shifty