I (F24)Found red hair in our (M32)shower. I’m blonde

I(F24) left our house for about 5 hours last night. Leaving my boyfriend(M32) home by himself. Not to long after I got home my boyfriend told me he was finding like balls of black hair so he swept the house. I thought it was weird but didn’t say anything. Once I went to shower I noticed my shampoo which I don’t keep in the shower was on the shower floor and when I picked it up I found a piece of hair that looked black but once in the light it was very obviously red. I have blonde/grey hair. Then when I got in the shower there was a few strains like wrapped onto the shower handle. Still didn’t say a word and just started to observe everything else; there was a charger on my side of the bed that isn’t mine and he doesn’t use that outlet or go on my half the bed. And then there was nail polish remover that he asked if I left it out and it wasn’t me. I decided to change the bedding and was taking my time because I knew I was too bothered to go to bed anytime soon he kept making comments about me looking for something and he knows how long it takes to make a bed so I’m obviously sly doing something else. Oh and this phone holder we have that was above our bed was moved and placed at the head of our bed. How can I get the truth out of him because I can already hear his “I’m not doing anything “ and how everything is just a coincidence or something like that. What would you do ??