Update:
So today BL asked me if we were still on for the upcoming gig. Well I followed this advice, which I think is great advice. Thanks MM!
Have a quick - but serious - chat with the guy. Explain to him that in order to prevent any more such confusing episodes from ever occurring again, it will be necessary to redefine your relationship to make it more businesslike.
That means 100% transparency about ALL terms of each gig - before you accept it, and well before you show up to play. This would include not only the total amount of compensation paid by the venue, but the way(s) in which BL intends to divide it up, etc. etc.
Make it clear that if the agreement is for your fair share of the cash to be paid directly to you, immediately after the conclusion of each gig, then that is what you expect from now on. NO EXCEPTIONS. If BL has in mind a way to pay you off, other than the one to which you had agreed, then he needs to obtain you prior consent - before you commit to the gig in question. Again, NO EXCEPTIONS.
My response to him was pretty much this exactly, but only condensed. The only difference was that all correspondence was via text.
I basically said that if I were going to do the gig, we needed to make the arrangement more professional and businesslike. We needed transparency about how I was to be paid before I agreed to the gig, and if any changes were to be made, he would need my prior consent. Also, transparency about the final sum that band was bringing in. I added that I would provide a written receipt that we would both sign, and he would receive the carbon copy. I finished by saying that I felt that this would be the best way to avoid any possible confusion that could arise, and that it would keep everyone happy.
Well, he did not like that at all. Now he is usually the type to wait 10 minutes to return a text, but in 2 minutes he reponsded with:
"Forget it lol"
7 minutes later:
"Are you serious lol? Forget it dude"
4 minutes later:
"That is the biggest bunch of bull**** I ever heard in my life. No hard feeling but ***king get real man"
So I finally responded with:
"One of us messed up last time and I just don't want another situation like that to happen again. I don't think that's unreasonable."
To which I have not heard back from him yet.
I think it only goes to show that he is really afraid to do anything legit. Someone who honestly thinks that they paid someone would certainly be all for this to avoid any future confusion. There is nothing in my proposed arrangement that is unusual, at least not in the real world. Why wouldn't you want to be clear about the terms up front? Why wouldn't you want to have bona fide evidence that you paid someone? We have a bunch of cash receipt pads at work with carbon copies that we don't even use anymore, and I would have written all of them out myself. He wouldn't have had to do anything different except for sign a receipt and put it in his pocket! I guess it is totally ridiculous in his fantasy land where he calls all the shots and operates in the shadows.
If he valued my friendship at all, it wouldn't have come to this. He would be doing anything he could to make things right, or at least been willing to make some sort of compromise (I know I would for my friends). Instead he was trying to make my perfectly reasonable request sound outlandish. "Get real man" I think I just did.
I never mentioned in any of my prior posts that another part of his defense in that he had already paid me was, "dude, I've got plenty of money, I've got no reason to keep your money." Well if that's the case, then pay me; what's another $40 bucks to you? Also, it you're not concerned about money, then why are you trying to take more pay when you have to drive further? There are other pieces of evidence that point to his lack of integrity, but at this point, they seem unnecessary.
So it only goes to show me that I should have trusted my gut to start with, and, like most of you said, washed my hands of him weeks ago. Well, at least I didn't get taken again, and now he stands more to lose than I had to gain anyway, so now he can sleep in the bed he has made for himself. Enjoy "bro!" It's definitely no sweat off my brow.
Big thanks to everyone who took the time to read my posts and type out replies offering their opinions and advice.