we moved too fast now i want to start again

Ok, here's the deal in a nutshell. We met and things took off really fast. In two months time we decided to move in together. I'm 29 she is 36 and has two kids. The day before I was to move in, she said "no, this is wrong."
After the sting went away, I realized I still loved her and now am in the position of trying to fiqure out how to explain this to her. Since we broke up, she has been very distant and introspective. I've told her how I feel but she still says "let's just see what happens."
I don't know if I should just let her be or keep trying to explain the deep feelings I have for her. It kills me to not be able to call her and say "I miss you." But I don't want to put pressure on her.
What's the next step?