I would have given her a call. If you had mentioned going out Sunday, I would expect you to call you continue with those plans. If you did not call, I would probably assume you weren't interested in going out still or had changed your mind. As far as her not being comfortable on the couch, it may just be because this was the second date. Personally, I wouldn't bring a guy home on a second date. She may have been afraid of what would happen if she got too close to you being you were not out in public. Just my take on it. It sounds like she is interested in you, but she may also still be a little fresh out of her relationship as you said it's only been a week. That is very soon for one to move onto someone else, I think. I would just give it time, call when you say you are going to call and see what happens. Good luck.