So rember the trip I planned to drop my daughter off in the dorms to visit a college.

My dumb ass told dude I was not only traveling but dropping her off in the dorms.

So he took it upon himself to invite himself (when he realized I'd be alone vs hunkered down with kid in tow). 

Then when he realized I wasn't planning with him, he started asking if I wanted him to go then acted a fool when I said I wanted some time to travel alone. 

(I was actually getting irritated that he turned what was supposed to be a stress-free weekend for me into a Victim Olymics/PowerSulk competition)

I admitted that I wanted ALONE time (I didn't say this but I'm paying for the privilege not to have to worry about dealing with him/his kids). and as a compromised offered for him to stay ONE night. 

He get pissy and demands that if he can't come right after work (which whould put him at approximately 11:30pm arrival or later - and I don't want to stay up that late) then he refuses to come at all. 

FINE!

Why would I want to pay to have my peace disturbed by him like how he's doing right now.

He cannot (or pretends to not be able to) comprehend how his behavior makes me not want to be around him. His constant clinging, his co-dependency, his unlimited guilt-trips and Mantrums when things don't go his way, 

You mean to tell me you have a weekend free and you can't figure out what to do with yourself?