I'm having my wedding in the Bahamas, but I am not giving my son $1500 so he can attend.
Is there a reason you don't want to give him the money?
I think since I have given him a lot of money in the past he thinks he has a right to my hard earned money.
You don't have to keep supporting your adult son or have him at your wedding if you don't want him there. He can pay his own way and not keep feeling entitled.
Exactly, and he doesn't care about the fact that he's invited or not, he just thinks I'm still going to pay for everything.
I commend yo for setting boundaries with your son, as his financial expectations of you seem unreasonable. If he wants to attend your wedding I'm sure he can find alternative means to come up with the $1500.