ditto www's message, bugsy. He wants to be liked by you and everyone else, without doing a single thing to earn it, and he's even got the cheek to hedge his bets. Pure maniplution and cowardliness.
Really, after all that's happened, after finding those 18 text messages, what sort of holiday would you have if he came with you? What are the chances of it being a happy one?
FWIW, I go away for weekends with my children and minus my dh. No disrespect to my dh, but I have had some lovely times alone with my children. I am the captain of my own ship and just have me and the children to please. Bliss.
In fact I am going off this weekend without dh. I know this is different to your situation - a weekend in the UK is not like 2 weeks abroad, I am not going through a break up and my oldest is 9 years old - but I really can see where tinker is coming from.
If you think you know of anyone who would want to come with you, DO break silence and ask them. Put your needs first. Do not for ONE minute think you must put your husband's needs above yours.