I agree with Jay…

I’m confused too. You showed you care, you send her a message. It’s understandable that your place is a mess, as you were worried and in anxiety..  And I agree you should talk before you have sex.

Now she is the one who seems to act more immature and doesn’t communicate. She asks for space, but comes to your place, then runs away and asks for space again. I don’t think you did nothing wrong today.

What seems to me, it’s that she may feel insecure. Maybe this situation has reminded her of her insecurities about how your relationship ended the first time. And she may be scared it could happen again. You describe her as if she is perfect, but as I said to you earlier, I agree she may be a wonderful girl, but no one is perfect. So she may have her insecurities too. It seems to me she cares about you but she is scared.
I also remember, she did not reply immediately when you first contacted her and asked her to meet, months after the break up.