How do I act?

[Cautious]

I'm thinking a cruise is just the type of distraction that would force you to GAL, much less get some distance from your H. Being so available to him seems to be making him angry, possibly from the hurt and regret he feels.

Even if your H end things with OW, he's going to have some form of withdrawl. Please reread that section in DB, MW-D can say all these things so much better than I can. I can't even tell you how much of a blow reading about the OW was for me, it was like some kind of empathetic nirvana... or something. I hope you find a way to have a good time for YOU so you're not just simmering in this pain.