I like this girl what next?

super_shy

So I like this girl she's a bit younger than me she's 24 and I am 37. We have been out to dinner she offered to pay in exchange for a favor I did for her.

I know she is into architecture so I when I was working ( programmer ) at a modern mansion I invited her to come and she did and stayed over night ( separate room). she seemd to have a good time.

And finally I invited her to Thanksgiving at a friends home. She seemd to enjoy all of it. I am very shy and unsure where to go from here. we do some playful touching, we get a long well and text ~ daily. She said to one of my friends that she is concerned about our age difference there is not much I can do about that. Thoughts what do I do next?

Additional info:

We have some friends in common

We have a sort of fun ongoing work out related bet which makes for a good excuse for her to send me photos of her at the gym.

I have rarely dated just 2 girls and I have never made the first move but I kinda think it may be required in this instance.

oh we also went bowling with some other friends of mine and out to dinner and again insisted on paying me back for her portion.

Updates
4 mo
Eventually she just sad the age gap is too much... ouch.
Updates
4 mo
lot of effort for a lot of pain.
I like this girl what next?
2 Opinion