My son did a meditation retreat when he was 17,it changed his outlook on life. He still does Vipassana meditation. He is the nicest,most balanced, most sane person I know. I have my own meditation retreat booked, in Thailand, for June this year!
I have sailed from Langkawi to the Southern Thai Islands. Fantastic scenery, just check the monsoon season for the winds. We can suffer from the 'doldrums' here in Asia, (I suspect you have had enough of being in them already!).
Regarding DB techniques, in my experience they will do what they will do and very little we say or do other than filing for divorce or walking away makes any difference (in my opinion).
He is the one who has done the 'dirty' on you he MUST take some of the consequences. If he has an affair he has no right to be in the marital bed. You preserve that right. End of story.
