He was my best friend in junior high and high school and he was even valedictorian. He seems to want to be my friend again but I can't reconcile that he's tried heroin more than a handful of times.

What I know about heroin addicts is that they will murder their own family to steal $50 to score their next high (maybe a bit exaggerated but still). How do I know he isn't lying and is a full-blown addict?

He has a decent career at a paint store as assistant manager and he has an ex-wife but I don't really know him well anymore as we've lost touch the last 10 years.

I kinda want to be his friend again but heroin would be a deal-breaker if I actually had a decent friend count but I've got like 1 actual friend and 2 "half-friends" at best.

I'm a very clean guy who doesn't drink or do drugs, but I want to hear from people wiser than myself on this issue. Thanks guys.