I have to agree with those who have said that this just doesn't sound that confusing. She has made it clear that she doesn't want a romantic relationship with you, for whatever reason (and there are many possible reasons) - maybe she's not interested, maybe she is and has just decided not to act on it, I don't know. But in any case, she has been quite consistent on that. At the same time, she seems to be making it clear that she likes you.
So - and I realize I'm looking at this as a total outsider - what's so odd about wanting to be friends with someone you don't want to have a romantic relationship with? I mean, isn't liking somebody a really basic requirement of friendship?

And it's a lot more comfortable and workable if this person is also someone you aren't interested in romantically.
I just don't see the craziness here. I don't see the confusion here. I don't see anything the least bit odd about this, I'm sorry to say.
And I also have to agree with those who have said that if you want to find out what's going through her mind, you're going to have to ask her. But don't be too surprised if she says, "I like you but I don't want a relationship with you." I mean, that's what she's said, right?
And BTW, my reaction to a guy I'm not interested in trying to make me jealous would be, "Oh, how nice - he's found someone else he likes." If it's a guy I was interested in romantically, I'd write him off. Really. I don't compete for men. So it's a pretty risky techique, if you ask me.