I am not sure if I have found some strange cultural problem. Do all Thai people ask you the most personal questions? Things like “How much money you make? You married yet? Why not? You got girlfriend? Apart from the fact that this is considered a very rude way of starting a relationship in the UK, I also find it very embarrassing when I am over here. How do I get these people to stop doing this? You seem to have the answers for everyone else, so I hope you have some for me too.
Direct questions come from a bar girl somewhere. They are not in the habit of issuing a gilt edged invitation to dinner, hand inscribed in Ye Olde English. Be thankful that ‘these people’ as you call them are interested enough in you to even ask questions. Lighten up!