As a generalization women in their early 30s need the least amount of work to make magic
- They aren't young and naive, expecting fairytale princes
- Most of them feel there is a biological countdown
- They are sexually experienced but havent let themselves go/lost touch

The problem I see it is:
You're a decent guy
All girls are looking for decent guys
So she dates you
But there isn't any magic there, maybe a little attraction but nothing magnetic
You both acknowledge that you're both attractive and decent people
There is nothing wrong to call things off but nothing to progress things either.

Choices are as Phil suggests
Take charge and make the magic happen or
Let it slide and find somebody else

go with option 1 because if it doesn't work, option 2 will happen regardless.

If you are looking advice on how to make the magic happen then try the following:
-Be politely assertive so for the next date tell her what you are doing and when but in a way that sounds like a question "Hey there is this awesome thing on this Saturday - I'll pick you up, is 8 ok?" You've pretty much told her you are going to the awesome thing but have asked the question about the time.
- Gently tease her during the date, nothing personal or deep, just about her week or a funny story that happened
- Take charge and just hold her damn hand! do it without thinking about it so it's not a big deal, when you are walking along just grab her hand and hold it.
- If she doesn't tear away from the above then keep going it and and some point when walking to the car/house/scene of the crime just pul her close and kiss her before she has a chance to think about pointless crap!