dick of the day

I wasn't exactly mean...but I might as well have been. And is it strange of me to feel bad, considering the circumstances?
The conditions of me getting my money back is to hang out with the ex. SO I bring over the most brutal show ever (Metalaco.) because he's into metal, should get a kick out of it. Slightly awkward, I am 'listening' to him even though I am mostly watching the show, besides how long can one listen to an ex talk about how much "fuckin beer I drink. oh god I party so much" etc. horrible etc....
He goes through 3 or 4 coors lite in the hour and perhaps half that I am there, really no big deal, but he turns to me and says "As you can see I drink a lot of beer"...as if I didn't pick up that little fact from the REST of the conversation. Eyeing his gigantic belly (=/ I know, what did I ever see in him?...honestly he was a sweet guy) I lean over and slap it and say "yeah I can tell."
Overdone? Out of bounds?
When I am out the door I say "See you next monday, when I drop off such and such movie [that he asked to borrow] and I pick up my next $100." And thus I leave. That's the only part I actually felt bad about...the fact that I leave on the note of "you still owe me lots of money so it looks like the only reason we are hanging out is for me to get paid" [kind of is], but he brings up the beer comment in a later text saying along the lines of "Don't worry I will sell that car and get your fucking money so you don't ever have to see my fat ass again."
Is he being a drama queen or am I really being a dick?