24yr old son renting a flat, has started using drugs he won’t tell me why, appears depressed and has tried to OD, I’ve only found this out via ex girlfriend. Son is unable to pay rent as has spent money on holiday, new car, tattoo, once he told me what was going on, we lent him £3000, as I could see he was struggling. Now he’s still using, refusing help, keeps pushing back on anything we try and offer is GP referral, find different cheaper rental, MH referral. Just don’t know what to do and I’m really worried about the payment for the flat as I’m guarantor for it. Any advice ??