Yeah. And the thing that I think has to be repeated. As hard as it is. He, might not get better. He might continue all the way to the grave.
There's 2 choices, you can save yourself, or you can let him destroy you financially and emotionally. Neither option carries any guarantees for him though.
You can't save him, only he can do that.
There is absolutely NOTHING anyone in my life could have said to me, no matter how much I loved them, that would have gotten me to stop for them. You might want very badly to give your loved ones what they want, but you find you just can't.
You either get to a point where you've had enough, and that's usually because you've lost nearly everything you cared about, or you don't.
Odds are he will bankrupt the people around him if they let him.
As
@TripSitterNZ said, generally your using will increase up to the limit of whatever your financial resources are. Whether they be legitimate, criminal, hustling people, whatever.
You can't believe anything he tells you. Anything could be a manipulation. If you give him money, whether he asks for it or you think you're offering it or no matter what the circumstances appear to be, it's likely it'll go to drugs.
I got people to loan me or give me money for a million different reasons, often very compelling reasons, sometimes with seemingly no way they could be being used for drugs. But in virtually every instance that's where it wound up. In a needle.
Never underestimate how manipulative an addict can be. Regardless of how trustworthy they may have seemed once. Even if it's not giving money directly to him, if you're spending money in any way that you otherwise wouldn't have were it not for him, you should assume it is somehow helping his habit. It might not be, but if he's in it bad enough it probably is.