My son who is nearly 40, won't pay his bills he spends all his money on drink and drugs. He will loose his flat if the bills arnt paid. I feel I should talk to him and not leave him to struggle. But when ever I weaken he asks me for money so I feel I shouldn't visit. What should I do? Im 64

The only way to stop his behavior is to stop enabling him. He's old enough to sink or swim.

EDIT: You asked this question earlier this month. Did you follow the advice? https://www.askmehelpdesk.com/parenting/abusive-son-732004.html