I think my fiancé is on meth! Help.

He lets these two guys ride with him to work. Here recently he has been just talking about drugs and how they’re made and listening to rap music about drugs. He is always wanting to leave the house whether it’s to drive 15 miles to get just a gallon of milk when we still have some in the fridge or he’s always going over to the guys house that rides with him or he gathers up some of our trash and takes it to the dumpster which is a few miles away even if it’s 10 at night. He finds anything to leave the house!

I found a used meth pipe in his pocket two days ago when we were shopping. I was upset about it. He said that he does not do meth. He said the meth pipe was one of the guys who rides with him and he is going to give it back to him. He used to always tell me that meth was nasty and he would never do that. These guys that ride with him will also come to our house a lot and they only stop by for 10 mins and talk quickly outside to my fiancé. I am so upset. I have a feeling he is on drugs and I don’t know what to do. I am pregnant with our 3rd baby, I can’t move out because I can’t afford to live on my own without him. He makes the big bucks. 😭 he will never admit to me that he’s doing it. Any advice on what I should do? I really don’t know.