There is something definitely not right with this woman.
She has now commented four times, "live for the moment, because tomorrow may never come" and "I don't want to let you down". Any mention of anything relationship related, even when I'm joking around, she starts a nervous laugh and acts weird.
I'm beginning to think she may have a terminal illness, even though she is extremely fit and looks healthy. It's as if she wants no emotional involvement to protect me. When she's with me she won't let go of me, her body language is saying the opposite to what she wants. I went into my spare room to sleep as she wouldn't let me turn over and sleep while hugging. A few minutes later she came in and said "please don't ever do that again, I thought you might have died"...I look healthy by the way!
Maybe she has suffered a bereavement, perhaps a husband or boyfriend that died? I've dated a woman with genuine mental health issues before, although this one is a mystery to me.