Payment problems

Sometimes acquaintances get too quaint, if you no what I mean?.. so I visited a friend in debarry, FL the passed couple of days. Lives on a golf course but doesn't want too, has a fucked situation with a baby momma drama, who pack everything and left when he was out of town on business. He's in the process of closing which costed him lots of money. On top of all of that he was high the whole time(party friendly here). I don't understand when guys think they can be your friend and get out of paying for your time. I hate even more when the act oblivious when you get upset and ask for payment. Why is it so difficult to just do what is predetermined. I'll never know..