Yeah I definitely agree that you were joking a bit too much with her. Just try and keep the jokes to a minimum and try and organise a get together a lot sooner. (In the future).
As for this situation, I think you should send her a message such as "Well, it was good to get to know you but it seems you are not interested. So I will move on. Good luck for the future" and then move on. If she is keen on you, she will resist this goodbye message and make A LOT more effort to get back to you.
This is the best way to let you know how things stand.