One way you could approach the idea of a date would be to ask her out for coffee or a drink which would imply a short outing.Also it may be a good idea to ask her a couple of days ahead so that she has ample time to decide what to do.They don't like to be confronted and they don't like to confront other people.
Indeed aggression is seen as counterproductive in Thai culture, and it is of complete ignorance and lack of courtesy to show any volatile emotions in public.
However if you are keen to keep dating your Thai girlfriend, try and avoid making sexual advances in the early dates.
Chances are that she is already worried about stereotypes of Thai girls and half expects you to make an inappropriate move.
All these values also come to the fore in case you wish to date Thai women living in western societies or American women of Thai origin.
Here are on the whole some tips for dating Thai women, which are sure to smoothen out misconceptions and make things that much easier.