Unaffectionate Or Uninterested?

I recently dated a woman who just didn’t seem interested in me.  So, after the first date, I was surprised to get an email from her saying that she really wanted to see me again.

On the second date, I was surprised to get the same “cool” response from her. Yet, again, she was interested in seeing me again.

Having verbally expressed her interest in me, I had to wonder if she is just not a physical person or if she is being guarded.  I am confused but I will just have to play it by ear.