A real important point to raise: Have you been paid anything yet?
If a guy gives me regular business, and pays promptly, then I consider sharpening my pencil, or doing some courtesy things.
If the guy loves you that much, maybe you're not charging enough. Time to think things through.
Finally...if the job is one of those endless, continuing things, and payments have been spotty.....maybe the guy is "gaming" you. The old "give me a break today, and there's lots more down the road" sort of hustle.
I would reccomend telling him you have other committments, and would prefer to finish one job- including getting paid the agreed amount in full- before starting the next one. If he's running a scam, he'll wail like a cat caught by a rocking chair, might even imply threats about your 'poor attitude.'
