Please don’t judge me...but I know my husband is lying about his drug useage, how do I approach this?!

My husband and I have been together for 6 years, married for two. We have a pretty good relationship, I’m very happy and I think he is too. When we first dated he had a huge cocaine problem, he didn’t see it as a problem, but I told him about 6 months in I can’t be with someone who literally blows all his money on blow...it was a huge waste of money and he was always super up and down with emotions and that’s not what I’m into at all. He stopped for a long time and things were fine. But recently I’m getting the sense he’s doing it again and lying. I’ve asked multiple times and he always says no, but I have a gut feeling he is. His job is very demanding sometimes 12+ hour days, so he doesn’t sleep much. That’s why he was doing so much years ago, to stay awake at work and social events. But there’s this new guy at his job and they’ve become friends in the last year. Casually I heard he sells/does cocaine from other people, and my husband confirmed. I had my suspicions and checked my husbands phone for the texts with his friend, and while they’re working they’ll text eachother one word texts randomly like “come” or “break room” or “upstairs”. To me that’s sketchy because clearly they’re meeting somewhere to do something. He’s also been very non existent when he’s home, like he doesn’t want to talk or do anything, and he gets so annoyed at the littlest things. I try and look at his pupils to see if they’re big, but I can never tell compared to his normal eyes. But I asked my husband and he has an excuse every time, saying they’re vaping together or doing something for work when they text eachother. I know he’s lying. My friends told me to drug test him, but I’m not his mom I don’t want to have to piss test my husband to see if he’s lying. I just want him to tell me the truth, and figure out if we can get through this or not. And don’t worry people, we have no kids and don’t want kids anytime soon, it’s just him and I. I don’t want to have kids with someone who does drugs, I just can’t do that to another human, because I already feel crappy about the situation.

So what should I do? Because when I ask, it’s lies, I just want my husband to be honest with me.