I tend to agree with what GS just posted... Throughout your time on this forum I've had the sense from your posts that that P has you there to boost his ego, and to feel as though if he can't pick up anything newer or more interesting, you'll be there at the end to go home with.
If it was working out for you the same way as it is working out for him, I would think that this is a mutually acceptable arrangement, but it's obvious that you do not get the same thrill out of this routine as he does. It doesn't sound from your stories like he wants to change, especially since things have been going the way he prefers them to for all this time. He sounds like one of "those" guys who says "This is the way I am. If you want to be with me, you have to accept me for who I am," which is euphemism for "I'm gonna do what I feel like doing and if you don't like it you don't have to watch."