What is the actual point

My fwb who I only get with like once a year will have me over then what I believe are excuses to have me leave some hours after we fuck, which is whatever, but he will always tell me “How about we go out to eat tomorrow” and he seems all genuine and sweet about it and I’m like ok and then the next day he doesn’t hmu or he sends me a text of an excuse why he can’t take me out. So why does he even tell me he wants to take me out the next day??? He always does this. Why can’t he just skip the let’s go out tomorrow?? What’s the point in him saying that knowing he doesn’t want it to happen? And knowing I’ll fuck him regardless? 😂 I really don’t care either way he’s my fuck buddy who I rarely see I just wanna know why he says that every time.