"Is he still into drugs? Do you have any reason to suspect that he is? If at any point in time you have reason to suspect that he could be, then you need to take action since he might still be involved and you'll need your friends around you to help you make the right decision, whatever it might be.
But if he isn't, then your friends just don't need to know. Oh sure, you should probably tell your closest bud (the one that you'd take a bullet for) because they're the person who is most likely to understand why you held back, but the rest? Nah. It's not really deceiving as much as it's just that they don't need to know all of the dirty laundry. I'm sure that they have things that they've never told you or your hubby, things that you'd probably judge them on as well."