I'd quit spending your money on him. You can hang out and do free things or not hang out. This will do two things for you. 1) You'll have your money. 2) You'll get a better feel for the relationship. Right now things are waaaay out of balance.
I've been down this road. As long as his parents pay his bills and you pay for his entertainment he'll get a job around the same time hell freezes over.
To look at this from a more self-recovery stand point it is like putting in a written request for resentment to buy things for a man with no job with the expectation that he'll repay any of it when he gets a few extra bucks. He'll never repay it. He has no income and isn't looking for a job. He's looking to sponge off family and friends.