@talbot This is a difficult spot to be in, isn't it? A parent wants to see their child succeed, and be happy. And at the same time, you want to be able to help if needed.

I know there will be others who step in to this conversation, sharing their experiences. From what you have said, the generalized anxiety is your son's issue, and the therapist is recommending the "tough love" of not sending more money to him. And your son respects this idea, even if he is not happy with it. Is this right? Are you concerned how he will react if you follow through and stop sending money? Is he using funds you send him for getting help, now?
Ginger