WTF... That is a terrible thing to say. I would not be able to forgive him.

I don't think you should 'no-show', though. For your own benefit, I think if you're going to end this it needs to end properly, even if that means just making sure that he knows exactly how much he has hurt you and why you feel you can't continue.

It does seem a shame to end an eighteen month relationship, especially if it has otherwise been great... but... I dunno. I'm horrified that a therapist of all people could say something like that. I'm really horrified.