Fiancé and suspected drug abuse

My fiancé and I had a huge blow out on Friday night , he came home mad for no reason and I feel he’s using cocaine I haven’t found it and he won’t admit to it but every time I feel he used is because he comes home irritated and he’s losing a lot of weight and he’s always hot wanting the house cold even tho it’s freezing outside . He has a co worker with who I believe he does the drug with , it’s only when he sees that co worker that he comes home like that 😔 he got aggressive on Friday I had to call the cops of course he left before they got here . Well that co worker stays in hotel and my fiancé went to stay with him at the hotel . He came back Sunday afternoon, he got loud and the cops were called this time by a neighbor . Well the cops took him in . I went thru his phone to see if there was any messages with the co worker about drugs . Well I also searched his history he looked at 197 porn videos from 1am to 5 am that means he didn’t sleep , I suspect he was under the influence of drugs that he didn’t sleep , I don’t know how to confront him about it without saying I went thru his phone I’m so upset .