J- are you PMSing or is this about S taking this out of town trip without you? Seems like you've let one email take the wind out of your sails - I thought you were making progress last week.
For Pete's sake, don't dump him before you go to Chile!
Look - he's improving steadily, and that last convo about the sex stuff was a great new improvement on his part, being willing to break the old patterns of interaction. Patience and Fortitude. Maybe you're just succumbing to a little bit of the willies (many LBSs start to falter just when things start looking good, because it means being vulnerable again, and that's scary)?
Why not just put your focus elsewhere for a few days and see how you feel about it next week?