Hey at least you are aware that this coffee shop thing isn't working, so switch it up a bit. I like to wait until I have to go somewhere and then just take them with me e.g. food/clothes shopping, a film I want to see, or a pub i like to go etc etc

You are coming from a completely different headspace when you're doing what you would do anyway, takes the pressure off you & her. There is in complete contrast to meeting a new person for coffee, it just makes it unnecessarily awkward IMO.

Another thing ill say about meeting up is just to ASSUME and treat her like you have known her for ages, this will allow your natural self to come out easier and you wont feel like you have to be cocky/funny coz it will happen anyway.

Hope that helps :-)