What would you do 18 yr old son moves out over 3 wks He is crashing at friends and 20 yr old GF house We are still paying for his car and medical ins AAA and gym membership where he takes his showers?

What would you do 18 yr old son moves out over 3 wks He is crashing at friends and 20 yr old GF house We are still paying for his car and medical ins AAA and gym membership where he takes his showers?
Stop paying his bills and tell him to get a job!